Cita APA (7th ed.)

Shafer, R. J. (1980). A guide to historical method (3rd ed.). Dorsey.

Cita Chicago (17th ed.)

Shafer, Robert J. A Guide to Historical Method. 3rd ed. Ontario: Dorsey, 1980.

Cita MLA (9th ed.)

Shafer, Robert J. A Guide to Historical Method. 3rd ed. Dorsey, 1980.