Cita APA (7a ed.)

Herbert, W. H., & Dunlap, H. J. (1921). Magnetic observations in western Canada with three isomagnetic maps. Government Printing Bureau.

Cita Chicago Style (17a ed.)

Herbert, W. H., y H. J. Dunlap. Magnetic Observations in Western Canada with Three Isomagnetic Maps. Ottawa: Government Printing Bureau, 1921.

Cita MLA (9a ed.)

Herbert, W. H., y H. J. Dunlap. Magnetic Observations in Western Canada with Three Isomagnetic Maps. Government Printing Bureau, 1921.