Cita APA (7th ed.)

Sawhney,g.s. (2012). Non-conventional energy resources. PHI learning pvt.

Cita Chicago (17th ed.)

Sawhney,g.s. Non-conventional Energy Resources. Delhi: PHI learning pvt, 2012.

Cita MLA (9th ed.)

Sawhney,g.s. Non-conventional Energy Resources. PHI learning pvt, 2012.