APA引文

Twenhofel, W. H. (1953). Principles of invertebrate paleontology (2nd ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Twenhofel, W. H. Principles of Invertebrate Paleontology. 2nd ed. New York: McGraw-Hill, 1953.

MLA引文

Twenhofel, W. H. Principles of Invertebrate Paleontology. 2nd ed. McGraw-Hill, 1953.