APA (7th ed.) Citation

Ponce de Leon, P. (1968). A revision of the Family Geastraceae. Field Museum of Natural History.

Chicago Style (17th ed.) Citation

Ponce de Leon, Patricio. A Revision of the Family Geastraceae. [Chicago]: Field Museum of Natural History, 1968.

MLA (9th ed.) Citation

Ponce de Leon, Patricio. A Revision of the Family Geastraceae. Field Museum of Natural History, 1968.