Agarwal KC. (2001). Fundamentals of environmental biology. Nidhi.
Chicago Style aipamenaAgarwal KC. Fundamentals of Environmental Biology. Bikaner: Nidhi, 2001.
MLA aipamenaAgarwal KC. Fundamentals of Environmental Biology. Nidhi, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.