Παραπομπή APA

Thorpe,Edgar, & Thorpe,Showick. (2003). Objective english. Pearson Education.

Παραπομπή Chicago Style

Thorpe,Edgar, και Thorpe,Showick. Objective English. New Delhi: Pearson Education, 2003.

Παραπομπή MLA

Thorpe,Edgar, και Thorpe,Showick. Objective English. Pearson Education, 2003.