Cita APA (7a ed.)

Harry, K., John, M., & Keegan, D. (1993). Distance education: New perspectives. Routledge.

Cita Chicago Style (17a ed.)

Harry, Keith, Magnus John, y Desmond Keegan. Distance Education: New Perspectives. London [etc.]: Routledge, 1993.

Cita MLA (9a ed.)

Harry, Keith, et al. Distance Education: New Perspectives. Routledge, 1993.