APA aipamena

 Engelman, R. (2008).  More: Population, nature, and what women want.  Island Press.

Chicago Style aipamena

 Engelman, Robert.  More: Population, Nature, and What Women Want.  Island Press, 2008.

MLA aipamena

 Engelman, Robert.  More: Population, Nature, and What Women Want.  Island Press, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.