Permian crinoid Calceolispongia
MLA
Teichert, Curt. Permian Crinoid Calceolispongia. Geological Society of America. Memoir. [New York: Geological Society of America], 1949
APA, 7th edition
Teichert, C. (1949). Permian crinoid Calceolispongia. Geological Society of America. Memoir. [New York: Geological Society of America]
Chicago, 17th edition
Teichert, Curt. Permian crinoid Calceolispongia. Geological Society of America. Memoir. [New York: Geological Society of America], 1949