Mammal survey of southeastern Pennsylvania / by Harvey A. Roberts and Robert C. Early.

Chicago citation style
Roberts, Harvey A. Mammal survey of southeastern Pennsylvania / by Harvey A. Roberts and Robert C. Early.. Retrieved from the Digital Public Library of America, https://archive.org/details/mammalsurveyofso00robe. (Accessed December 10, 2018.)
APA citation style
Roberts, Harvey A, Mammal survey of southeastern Pennsylvania / by Harvey A. Roberts and Robert C. Early.. Retrieved from the Digital Public Library of America, https://archive.org/details/mammalsurveyofso00robe
MLA citation style
Roberts, Harvey A. Retrieved from the Digital Public Library of America <https://archive.org/details/mammalsurveyofso00robe>.
Note: These citations are programmatically generated and may be incomplete.