United States Patent Office

MLA

Molera i Bros, and Cebrian. United States Patent Office: Improvement In Motor-engines. San Francisco: [s.a.], 1879.

APA

Molera i Bros, M. i Bros, & Cebrian, C. (1879). United States Patent Office: Improvement in motor-engines. San Francisco: [s.a.].

Chicago

Molera i Bros, and Cebrian. United States Patent Office: Improvement In Motor-Engines. San Francisco: [s.a.], 1879.