Cita APA (7a ed.)

Ritchie, D. A., Althoff, M., & Wilson, R. (1985). Heritage of freedom: History of the United States. Scribner Educational Publ.

Cita Chicago Style (17a ed.)

Ritchie, Donald A., Margaret Althoff, y Richard Wilson. Heritage of Freedom: History of the United States. New York [u.a.]: Scribner Educational Publ, 1985.

Cita MLA (9a ed.)

Ritchie, Donald A., et al. Heritage of Freedom: History of the United States. Scribner Educational Publ, 1985.