Παραπομπή APA

Khanna, K., & Gupta, V. (1978). Economic and commercial geography. Sultanchand & Sons.

Παραπομπή Chicago Style

Khanna, K.K, και V.K Gupta. Economic and Commercial Geography. New Delhi: Sultanchand & Sons, 1978.

Παραπομπή MLA

Khanna, K.K, και V.K Gupta. Economic and Commercial Geography. Sultanchand & Sons, 1978.