Παραπομπή APA

Duignan, P. (1980). United States in the 1980's. Kalyani.

Παραπομπή Chicago Style

Duignan, Peter. United States in the 1980's. New Delhi: Kalyani, 1980.

Παραπομπή MLA

Duignan, Peter. United States in the 1980's. Kalyani, 1980.