Cita APA

Palmer, R. R., Colton, J., & Kramer, L. S. (2002). A history of the modern world (9th ed.). McGraw-Hill.

Citación estilo Chicago

Palmer, R. R., Joel Colton, and Lloyd S. Kramer. A History of the Modern World. 9th ed. Boston: McGraw-Hill, 2002.

Cita MLA

Palmer, R. R., et al. A History of the Modern World. 9th ed. McGraw-Hill, 2002.