You should include a citation (reference) whenever you use someone else’s work or ideas and when you paraphrase, quote, summarise, or otherwise refer to or draw upon someone else’s work.
The main purpose of referencing is to identify the source you are relying on. This means the author, text, date and page number should be included. If this is a Web reference the date of access should also be included.
Show the marker clearly where you found the source and include the date and time you accessed the source.