APA-viite (7. p.)

Dulan, S. (2007). GRE examination preparation. Pearson Education.

Chicago-viite (17. p.)

Dulan, Steven. GRE Examination Preparation. New Delhi: Pearson Education, 2007.

MLA-viite (9. p.)

Dulan, Steven. GRE Examination Preparation. Pearson Education, 2007.