Cita APA (7a ed.)

Westbrook, J., & Conrad, H. (1973). The science of hardness testing and its research applications (1a ed.). American Society For Metals.

Cita Chicago Style (17a ed.)

Westbrook, J.K, y H. Conrad. The Science of Hardness Testing and Its Research Applications. 1a ed. Ohio: American Society For Metals, 1973.

Cita MLA (9a ed.)

Westbrook, J.K, y H. Conrad. The Science of Hardness Testing and Its Research Applications. 1a ed. American Society For Metals, 1973.