Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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