APA (7th ed.) Citation

Harker, A. (1960). Petrology for students: An introd. to the study of rocks under the microscope (8. ed. rev.). Univ. Pr.

Chicago Style (17th ed.) Citation

Harker, Alfred. Petrology for Students: An Introd. to the Study of Rocks Under the Microscope. 8. ed. rev. Cambridge: Univ. Pr, 1960.

MLA (9th ed.) Citation

Harker, Alfred. Petrology for Students: An Introd. to the Study of Rocks Under the Microscope. 8. ed. rev. Univ. Pr, 1960.