Gibbons, W. (2013). Their blood runs cold: Adventures with reptiles and amphibians (13th anniversary ed.). University Alabama Press.
Chicago-referens (17:e uppl.)Gibbons, Whit. Their Blood Runs Cold: Adventures with Reptiles and Amphibians. 13th anniversary ed. Tuscaloosa: University Alabama Press, 2013.
MLA-referens (9:e uppl.)Gibbons, Whit. Their Blood Runs Cold: Adventures with Reptiles and Amphibians. 13th anniversary ed. University Alabama Press, 2013.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.