Cita APA (7a ed.)

Walcott, C. D. (1928). Cambrian geology and paleontology. Smithsonian Institution.

Cita Chicago Style (17a ed.)

Walcott, Charles Doolittle. Cambrian Geology and Paleontology. Washington: Smithsonian Institution, 1928.

Cita MLA (8a ed.)

Walcott, Charles Doolittle. Cambrian Geology and Paleontology. Smithsonian Institution, 1928.