When you write an assignment, you use information from different sources. It is important that you acknowledge their authors and publishers, in listing them.
There are several standards for writing them. You can use footnotes or place the list at the conclusion of your assignment (Bibliography). There, you can list all of your sources in the order of appearance in the paper or in alphabetical order. Which ever you choose, keep the format consistent.
For a book:
Author’s Last Name, First Name. Title in Italic. Place of publication: Publisher, Year of publication.
Example: Gleitzman, Morris. Boy Overboard. Camberwell: Penguin, 2002.
Author Last Name, First name. “Title of Article”. Magazine Name in Italic. Date of publication. Pages.
Example: Nachtwey, James. “Mandela’s Children”. National Geographic. June 2010. p80-109.
Author’s name, Title. database name in Italic (if from a database), Date you accessed it, <url of the page>
Example: Eileen McSaveney. Historic earthquakes: Liquefaction demonstrated, Te Ara – the Encyclopedia of New Zealand, 15/06/2011,
See also the Information Literacy Tutorial here