Παραπομπή APA

Kolby,Jeff. (2003). GMAT Prep Course: With Software. prakash.

Παραπομπή Chicago Style

Kolby,Jeff. GMAT Prep Course: With Software. delhi: prakash, 2003.

Παραπομπή MLA

Kolby,Jeff. GMAT Prep Course: With Software. prakash, 2003.