Παραπομπή APA

Khanna, K. (1978). Economic and commercial geography. Sultan chand & co.

Παραπομπή Chicago Style

Khanna, K.K. Economic and Commercial Geography. New Delhi: Sultan chand & co, 1978.

Παραπομπή MLA

Khanna, K.K. Economic and Commercial Geography. Sultan chand & co, 1978.