APA (7th ed.) Citation

Ash, S. R. (1969). Ferns from the Chinle Formation (Upper Triassic) in the Fort Wingate area, New Mexico. U.S. Govt. Print Off.

Chicago Style (17th ed.) Citation

Ash, Sidney R. Ferns from the Chinle Formation (Upper Triassic) in the Fort Wingate Area, New Mexico. Washington: U.S. Govt. Print Off, 1969.

MLA (9th ed.) Citation

Ash, Sidney R. Ferns from the Chinle Formation (Upper Triassic) in the Fort Wingate Area, New Mexico. U.S. Govt. Print Off, 1969.