Dyfyniad APA

Lenburg, J. (2007). Viva- Facts On File guide to research. Viva Books Pvt. ltd..

Dyfyniad Arddull Chicago

Lenburg, Jeff. Viva- Facts On File Guide to Research. New Delhi: Viva Books Pvt. ltd., 2007.

Dyfyniad MLA

Lenburg, Jeff. Viva- Facts On File Guide to Research. Viva Books Pvt. ltd., 2007.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.