Cita APA (7a ed.)

Bahmueller, C. F., & Rasmussen, R. K. (2007). The 50 states (2nd ed.). Salem Press.

Cita Chicago Style (17a ed.)

Bahmueller, Charles F., y R. Kent Rasmussen. The 50 States. 2nd ed. Pasadena, Calif.: Salem Press, 2007.

Cita MLA (8a ed.)

Bahmueller, Charles F., y R. Kent Rasmussen. The 50 States. 2nd ed. Salem Press, 2007.