Cita APA

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

Citación estilo Chicago

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

Cita MLA

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