Παραπομπή APA

Gupta A Das. (1978). Economic and commercial geography. A Mukherjee.

Παραπομπή Chicago Style

Gupta A Das. Economic and Commercial Geography. Calcutta: A Mukherjee, 1978.

Παραπομπή MLA

Gupta A Das. Economic and Commercial Geography. A Mukherjee, 1978.