APA (7e ed.) Bronvermelding

Sharma, U., & Singh, A. (1990). Progress in environmental science and technology. Divyajyoti Prakashan.

Chicago (17e ed.) Bronvermelding

Sharma, U.S., en Alam Singh. Progress in Environmental Science and Technology. Jodhpur: Divyajyoti Prakashan, 1990.

MLA (9e ed.) Bronvermelding

Sharma, U.S., en Alam Singh. Progress in Environmental Science and Technology. Divyajyoti Prakashan, 1990.