APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Silberling, N. J., and E. T. Tozer. Biostratigraphic Classification of the Marine Triassic in North America. Boulder, Colo: Geological Society of America, 1968.

MLA (9th ed.) Citation

Silberling, N. J., and E. T. Tozer. Biostratigraphic Classification of the Marine Triassic in North America. Geological Society of America, 1968.