Required textbooks are used extensively for the paper and must be purchased.
Recommended textbooks are identified as useful for your study but purchase is optional.
While a suggested purchase option is provided, you can purchase a physical copy or ebook from a variety of online providers e.g. Amazon, Booktopia, publishers' websites and many others.
If you have any questions on where/how to purchase a required or recommended textbook contact the SIT Bookshop (contact details are on the Welcome page).