APA (7th ed.) Citation

Silberling, N. J., & Tozer, E. T. (1968). Biostratigraphic classification of the marine Triassic in North America.

Chicago Style (17th ed.) Citation

Silberling, Norman John, and Edward T. Tozer. Biostratigraphic Classification of the Marine Triassic in North America. Boulder, Colo, 1968.

MLA (9th ed.) Citation

Silberling, Norman John, and Edward T. Tozer. Biostratigraphic Classification of the Marine Triassic in North America. 1968.