APA引文

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

Chicago Edition Citation

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

MLA引文

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