APA (7th ed.) Citation

Galopin, R., & Henry, N. F. M. (1972). Microscopic study of opaque minerals. W. Heffer and Sons Ltd.

Chicago Style (17th ed.) Citation

Galopin, R., and N. F. M. Henry. Microscopic Study of Opaque Minerals. Cambridge: W. Heffer and Sons Ltd, 1972.

MLA (9th ed.) Citation

Galopin, R., and N. F. M. Henry. Microscopic Study of Opaque Minerals. W. Heffer and Sons Ltd, 1972.