APA (7th ed.) Citation

Harker, A. (1919). Petrology for students: An introduction to the study of rocks under the microscope (5th ed., rev.). The University Press.

Chicago Style (17th ed.) Citation

Harker, Alfred. Petrology for Students: An Introduction to the Study of Rocks Under the Microscope. 5th ed., rev. Cambridge [Eng.]: The University Press, 1919.

MLA (8th ed.) Citation

Harker, Alfred. Petrology for Students: An Introduction to the Study of Rocks Under the Microscope. 5th ed., rev. The University Press, 1919.