APA aipamena

Lenburg, J. (2007). Viva-Facts on file guide to research. Viva Books Private Limited.

Chicago Style aipamena

Lenburg, Jeff. Viva-Facts on File Guide to Research. New Delhi: Viva Books Private Limited, 2007.

MLA aipamena

Lenburg, Jeff. Viva-Facts on File Guide to Research. Viva Books Private Limited, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.