The Board of Studies, Teaching and Educational Standards NSW (BOSTES) has created a self-paced online course called the HSC: All My Own Work program. Read the information provided, find useful websites and complete quizzes for each of the five modules:
You don't need to remember how to reference every format in every style. You can:
Including a correctly formatted in-text citation and full reference list for all the sources you quoted or paraphrased in your assignment helps your teacher to see how much (fantastic) research you did, find and check your sources and see that you are not plagiarising.
Every time you use a direct quote or paraphrase somebody else's work you need to include both an in-text citation (except for styles that use footnotes) and a full reference in the reference list at the end of your assignment.
Your teacher may tell you which style to use, it may be written on your assignment sheet, or it might be up to you to choose what works best for you.
Some subjects have a favourite style; for instance, Psychology uses APA.
Harvard, APA and MLA are some common styles, but there are many more.
Each style has a different way of formatting the in-text citations and full references in the reference list, depending on what the source format is. Some referencing styles are part of a broader writing style that determines how you should format your document and specific rules for punctuation.