APA (7th ed.) Citation

Whitaker, S. H., Pearson, D. E., Elias, C. G., & Sardinha, J. C. (1972). Geological map of Saskatchewan. [Geological Sciences Branch].

Chicago Style (17th ed.) Citation

Whitaker, S. H., D. E. Pearson, C. G. Elias, and J. C. Sardinha. Geological Map of Saskatchewan. [Regina?]: [Geological Sciences Branch], 1972.

MLA (9th ed.) Citation

Whitaker, S. H., et al. Geological Map of Saskatchewan. [Geological Sciences Branch], 1972.