Clarke, R. F. (1958). An ecological study of reptiles and amphibians in Osage County, Kansas. Graduate Division of the Kansas State Teachers College.
Chicago-viite (17. p.)Clarke, Robert F. An Ecological Study of Reptiles and Amphibians in Osage County, Kansas. Emporia: Graduate Division of the Kansas State Teachers College, 1958.
MLA-viite (8. p.)Clarke, Robert F. An Ecological Study of Reptiles and Amphibians in Osage County, Kansas. Graduate Division of the Kansas State Teachers College, 1958.
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