Cita APA (7a ed.)

La Guardia, D., & Guth, H. P. (2002). American Voices (5. ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

La Guardia, Dolores, y Hans P. Guth. American Voices. 5. ed. Boston [u.a.]: McGraw-Hill, 2002.

Cita MLA (9a ed.)

La Guardia, Dolores, y Hans P. Guth. American Voices. 5. ed. McGraw-Hill, 2002.