APA aipamena

Rao, D. P. L. (1990). Energy conservation handbook (Ed.2.). Utility.

Chicago Style aipamena

Rao, Diwakar P L. Energy Conservation Handbook. Ed.2. Seconderabad: Utility, 1990.

MLA aipamena

Rao, Diwakar P L. Energy Conservation Handbook. Ed.2. Utility, 1990.