Παραπομπή APA

Sharma, H. (2004). Ozone depletion and environmental impacts. Pointer.

Παραπομπή Chicago Style

Sharma, H.S. Ozone Depletion and Environmental Impacts. Jaipur: Pointer, 2004.

Παραπομπή MLA

Sharma, H.S. Ozone Depletion and Environmental Impacts. Pointer, 2004.