Παραπομπή APA

Thorpe, E. (2009). Objective english (3rd. ed.). Pearson.

Παραπομπή Chicago Style

Thorpe, Edgar. Objective English. 3rd. ed. Chandigarh: Pearson, 2009.

Παραπομπή MLA

Thorpe, Edgar. Objective English. 3rd. ed. Pearson, 2009.