APA-referens (7:e uppl.)

Wrigley, E. A. (2004). Poverty, progress, and population. Cambridge University Press.

Chicago-referens (17:e uppl.)

Wrigley, E. A. Poverty, Progress, and Population. Cambridge: Cambridge University Press, 2004.

MLA-referens (9:e uppl.)

Wrigley, E. A. Poverty, Progress, and Population. Cambridge University Press, 2004.