Cita APA (7a ed.)

Firth, C. B., & Horsfall, L. F. (1949). History (Second series, 1. publ.). Ginn.

Cita Chicago Style (17a ed.)

Firth, Catherine B., y L. F. Horsfall. History. Second series, 1. publ. London: Ginn, 1949.

Cita MLA (9a ed.)

Firth, Catherine B., y L. F. Horsfall. History. Second series, 1. publ. Ginn, 1949.