Παραπομπή APA

Khanna, K. K., & Gupta, V. K. (1972). Economic and commercial geography (2nd. ed.). S.Chand & Co..

Παραπομπή Chicago Style

Khanna, K. K., και V. K. Gupta. Economic and Commercial Geography. 2nd. ed. S.Chand & Co., 1972.

Παραπομπή MLA

Khanna, K. K., και V. K. Gupta. Economic and Commercial Geography. 2nd. ed. S.Chand & Co., 1972.