Please confirm the referencing style with the academic staff member in charge of your research.
Some referencing methods have minor variations e.g. Harvard, Augmented Harvard and Harvard British Standard.
Be consistent when using a certain style.
The Chicago Manual of Style Online is the venerable, time-tested guide to style, usage, and grammar in an accessible online format. It is the indispensable reference for writers, editors, proofreaders, indexers, copywriters, designers, and publishers, informing the editorial canon with sound, definitive advice.