Pirsson, L. V., & Schuchert, C. (1920). A text-book of geology (2nd ed.). John Wiley.
Chicago Style (17th ed.) CitationPirsson, Louis V., and Charles Schuchert. A Text-book of Geology. 2nd ed. New York: John Wiley, 1920.
MLA (9th ed.) CitationPirsson, Louis V., and Charles Schuchert. A Text-book of Geology. 2nd ed. John Wiley, 1920.