The academic writing requires a systematic referencing and there are a number of methods to make citations. Among others, the Harvard Referencing is quite popular and it is recommended by many academic institutions and publishers.
In the assignment, it is compulsory to cite the sources of the concepts, theories, facts and information. The citations must appear both in the text and the list of references. There are also rules for different kinds of sources, e.g. books, journals, websites, reports, etc..
For the details, please see the uploaded document.