Gaya APA

Hartshorn, T, A., Alexander, J, W. (2007). Economy georgaphy (Ed.3). New Delhi: Prentice Hall of India private Limited.

Gaya MLA

Hartshorn, Truman, A.., Alexander, John, W.. "Economy georgaphy". Ed.3 New Delhi: Prentice Hall of India private Limited, 2007. Text.