APA استشهاد

Thomas, S. E. (2003). Economic and regional geography. Sumit enterprises.

استشهاد بنمط شيكاغو

Thomas, S Evelyn. Economic and Regional Geography. ND: Sumit enterprises, 2003.

MLA استشهاد

Thomas, S Evelyn. Economic and Regional Geography. Sumit enterprises, 2003.