Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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