Cita APA

Steele, P. 1., & Steele, P. 1. (2006). The medieval world. New York: Kingfisher.

Citación estilo Chicago

Steele, Philip 1948-, y Philip 1948- Steele. The Medieval World. New York: Kingfisher, 2006.

Cita MLA

Steele, Philip 1948-, y Philip 1948- Steele. The Medieval World. New York: Kingfisher, 2006.