Cita APA

Gavian, R. W., Hamm, W. A., & Freidel, F. B. (1965). United States history (Rev.). D.C. Heath.

Citación estilo Chicago

Gavian, Ruth Wood, William Albert Hamm, and Frank Burt Freidel. United States History. Rev. Boston: D.C. Heath, 1965.

Cita MLA

Gavian, Ruth Wood, et al. United States History. Rev. D.C. Heath, 1965.