You are required to use a particular referencing style to reference your sources. Many different styles are used at the university, and these may vary between faculties, disciplines and courses.
If you are not sure which style to use, check with your lecturer or tutor.
APA, Harvard, Chicago, MLA, University of Auckland Style
APA
See also The Business of Writing: Written Communication Skills for Business Students
APA, IEEE, Harvard, Chicago, MLA
NZLSG
See also New Zealand Law Style Guide