APA-referens (7:e uppl.)
Forsman, E. D. (2011). Population demography of northern spotted owls. University of California Press.
Chicago-referens (17:e uppl.)
Forsman, Eric D. Population Demography of Northern Spotted Owls. Berkeley: University of California Press, 2011.
MLA-referens (9:e uppl.)
Forsman, Eric D. Population Demography of Northern Spotted Owls. University of California Press, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.