APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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