A reference providing information about where a particular quotation, text, etc., is to be found; a bibliographical reference. [Oxford English Dictionary]
In general, citations help readers to locate your sources of information, as well as avoid plagiarism.
Understanding and avoiding plagiarism
You need to understand why and how to use citations to help you avoid plagiarism! The Online Tutorial on Academic Integrity has been developed to raise students’ awareness of academic integrity and the University’s expectations for honest academic behaviour. Use this interactive tutorial to understand the importance and mechanics of avoiding plagiarism through proper citing.
Hereford, J. M. (2014). Sleep and rehabilitation : a guide for health professionals. Thorofare, NJ : SLACK Incorporated.
Book - with editor(s)
Rundio, A. & Wilson, V. (Eds.) (2015). The doctor of nursing practice and the nurse executive role. Philadelphia : Wolters Kluwer.
Example 2 (Journal article)
Findik, U. Y., Unsar, S., & Sut, N. (2010). Patient satisfaction with nursing care and its relationship with patient characteristics. Nursing & Health Sciences, 12(2), 162–169.
Online article - without DOI
Kwok, S. T., Capra, S., & Leveritt, M. (2016). Factors influencing changes in eating patterns among hong kong young adults transitioning to tertiary education. Asia-Pacific Journal of Public Health / Asia-Pacific Academic Consortium for Public Health, 28(4), 347-355. Retrieved from http://www.sciencedirect.com/
Online article - with DOI
Byrne, M, Root, S. & Culbertson, L. (2016). Integrating perioperative content in nursing curricula: A case study approach. AORN Journal, 103 (6), 597-604. doi: http://dx.doi.org/10.1016/j.aorn.2016.03.013.
Citation link on databases
Many databases provide quick link to citation style, you can simply "copy" the citation from your search result list and "paste" to your document. The following are a few examples of copying APA citation (6th edition) from online sources:
Reference management tool
The Library offers several reference management tools: EndNote, Mendeley, and Zotero (which are freeware). Understand the features of these tools from this page and choose a proper tool to organize your citations and references. Refer to this EndNote FAQ if you encounter any problems with EndNote.
Citation and Journals
The following are the top 10 publishers which PolyU researchers have their works published across various subject areas in the recent 5 years.[Data from Scopus]
1. Elsevier 2. IEEE 3. Springer 4. Wiley 5. Taylor & Francis 6. Sage 7. Royal Society of Chemistry 8. Emerald 9. American Institute of Physics 10. American Chemical Society
If you are writing a paper for a journal, always check the citation style requirements from that specific journal, because different journal (or publisher) may use different citation styles.