Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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