It is important to ensure references are done correctly and consistently.
Take a look at the Department's own guide https://www.aber.ac.uk/en/aberskills/academic-practice/#departmental-reference-guides and the other resources available below.
Contact Simon, your Subject Librarian if you need any further advice or help.
One of the major features of academic writing is acknowledging the books, journal articles and other information sources that you have used, usually by citing them one-by-one in your assignment and listing them all at the end in a bibliography. Often there are many marks for doing this correctly so it is a skill worth learning as soon as you can.
If you don't acknowledge your sources you might pass off someone else's ideas, quotations etc. as your own. This is plagiarism which is not permitted by the university and can have serious consequences for you.
Find out more about plagiarism and referencing: Better marks with good referencing.
Complete the online course ‘Avoiding Plagiarism’
You are required to register at: https://www.epigeum.com/courses/studying/avoiding-plagiarism/