APA (American Psychological Association) style is one of the common citation styles for referencing:
APA Style Guide from Purdue Online Writing Lab
The resource provides the American Psychological Association (APA) citation and format style. It contains resources on in-text citation and the References page, as well as APA sample papers, slide presentations, and the APA classroom poster.
Coverage: 1990 - present
Indexes conference literature in all fields of social sciences, arts, and humanities. Includes all cited references captured from indexed articles and supports cited reference search.
Coverage: 1956 - present
A multidisciplinary index to the journal literature of the social sciences from over 3,300 of the world's leading scientific and technical journals. Includes all cited references captured from indexed articles and supports cited reference search.
Allows you to search multiple EbscoHost databases in one go, e.g. Academic Search Premier. Go to EbscoHost Databases, click on the iPhone and Android apps link at bottom and follow instructions. The email address supplied must end with cuhk.edu.hk