Cita APA (7th ed.)

Smith J. P. James Perrin. (1903). The Carboniferous ammonoids of America. Washington, Governmext Printing Office, 1903.

Cita Chicago (17th ed.)

Smith J. P. James Perrin. The Carboniferous Ammonoids of America. Washington, Governmext Printing Office, 1903, 1903.

Cita MLA (9th ed.)

Smith J. P. James Perrin. The Carboniferous Ammonoids of America. Washington, Governmext Printing Office, 1903, 1903.