Smith, P. W. (1961). The amphibians and reptiles of Illinois. Illinois Dept. of Registration and Education, Natural History Survey Division.
Chicago-Zitierstil (17. Ausg.)Smith, Philip W. The Amphibians and Reptiles of Illinois. Urbana, Ill: Illinois Dept. of Registration and Education, Natural History Survey Division, 1961.
MLA-Zitierstil (9. Ausg.)Smith, Philip W. The Amphibians and Reptiles of Illinois. Illinois Dept. of Registration and Education, Natural History Survey Division, 1961.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.