Cita APA (7a ed.)

Gavian, R. W., & Hamm, W. A. (1960). United States history. D.C. Heath.

Cita Chicago Style (17a ed.)

Gavian, Ruth Wood, y William Albert Hamm. United States History. Boston: D.C. Heath, 1960.

Cita MLA (8a ed.)

Gavian, Ruth Wood, y William Albert Hamm. United States History. D.C. Heath, 1960.