Cita APA (7th ed.)

Usher, R., Bryant, I., & Johnston, R. (1997). Adult education and the postmodern challenge. Routledge.

Cita Chicago (17th ed.)

Usher, Robin, Ian Bryant, i Rennie Johnston. Adult Education and the Postmodern Challenge. London: Routledge, 1997.

Cita MLA (9th ed.)

Usher, Robin, et al. Adult Education and the Postmodern Challenge. Routledge, 1997.