APA (7th ed.) Citation

Gadd, N. R., McDonald, B. C., & Shilts, W. W. (1972). Deglaciation of southern Quebec. Information Canada.

Chicago Style (17th ed.) Citation

Gadd, Nelson R., B. C. McDonald, and W. W. Shilts. Deglaciation of Southern Quebec. Ottawa: Information Canada, 1972.

MLA (9th ed.) Citation

Gadd, Nelson R., et al. Deglaciation of Southern Quebec. Information Canada, 1972.