APA (7th ed.) Citation

Ash, S. R., & Read, C. B. (1976). North American species of Tempskya and their stratigraphic significance. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Ash, Sidney R., and C. B. Read. North American Species of Tempskya and Their Stratigraphic Significance. Washington: U.S. Govt. Print. Off, 1976.

MLA (9th ed.) Citation

Ash, Sidney R., and C. B. Read. North American Species of Tempskya and Their Stratigraphic Significance. U.S. Govt. Print. Off, 1976.