APA (7e ed.) Bronvermelding

Peterson's. (2007). peterson's master toefl writing skills: Boost your toefl score! (First edition.). Peterson's.

Chicago (17e ed.) Bronvermelding

Peterson's. Peterson's Master Toefl Writing Skills: Boost Your Toefl Score! First edition. Lawrenceville, NJ: Peterson's, 2007.

MLA (9e ed.) Bronvermelding

Peterson's. Peterson's Master Toefl Writing Skills: Boost Your Toefl Score! First edition. Peterson's, 2007.