Chicago: Phillip E. Johnson, "Amphibians to Reptiles," Darwin on Trial Original Sources, accessed August 11, 2022, http://www.originalsources.com/Document.aspx?DocID=4YIYSIJRR9RMDCV.
MLA: Johnson, Phillip E. "Amphibians to Reptiles." Darwin on Trial, Original Sources. 11 Aug. 2022. http://www.originalsources.com/Document.aspx?DocID=4YIYSIJRR9RMDCV.
Harvard: Johnson, PE, 'Amphibians to Reptiles' in Darwin on Trial. Original Sources, retrieved 11 August 2022, from http://www.originalsources.com/Document.aspx?DocID=4YIYSIJRR9RMDCV.