Cita APA (7th ed.)

Kell, P., Shore, S., & Singh, M. (2004). Adult education @ 21st century. P. Lang.

Cita Chicago (17th ed.)

Kell, Peter, Sue Shore, i Michael Singh. Adult Education @ 21st Century. New York: P. Lang, 2004.

Cita MLA (9th ed.)

Kell, Peter, et al. Adult Education @ 21st Century. P. Lang, 2004.