APA (7th ed.) Citation

Walcott, C. D., & Resser, C. E. (1931). Addenda to descriptions of Burgess shale fossils: (with 23 plates). The Smithsonian Institution.

Chicago Style (17th ed.) Citation

Walcott, Charles D., and Charles Elmer Resser. Addenda to Descriptions of Burgess Shale Fossils: (with 23 Plates). City of Washington: The Smithsonian Institution, 1931.

MLA (9th ed.) Citation

Walcott, Charles D., and Charles Elmer Resser. Addenda to Descriptions of Burgess Shale Fossils: (with 23 Plates). The Smithsonian Institution, 1931.