APA (7th ed.) Citation

Geological Association of Canada, Gower, C. F., Rivers, T., & Ryan, A. B. (1990). Mid-Proterozoic Laurentia-Baltica. Geological Association of Canada, Dept. of Earth Sciences.

Chicago Style (17th ed.) Citation

Geological Association of Canada, Charles F. Gower, Toby Rivers, and Arthur Bruce Ryan. Mid-Proterozoic Laurentia-Baltica. St. John's, Nfld., Canada: Geological Association of Canada, Dept. of Earth Sciences, 1990.

MLA (9th ed.) Citation

Geological Association of Canada, et al. Mid-Proterozoic Laurentia-Baltica. Geological Association of Canada, Dept. of Earth Sciences, 1990.