APA (7th ed.) Citation

Hassen, M., Tigabu, J., & Shankar Sharma, H. (2007). Geography: Grade .. (Second Edition 2007.). Aster Nega Publishing Enterprise.

Chicago Style (17th ed.) Citation

Hassen, Menur, Jember Tigabu, and Hari Shankar Sharma. Geography: Grade .. Second Edition 2007. Addis Ababa: Aster Nega Publishing Enterprise, 2007.

MLA (9th ed.) Citation

Hassen, Menur, et al. Geography: Grade .. Second Edition 2007. Aster Nega Publishing Enterprise, 2007.