Cita APA (7a ed.)

Grant, L. K., & Spencer, R. E. (2003). The Personalized System of Instruction: Review and Applications to Distance Education. Athabasca University Press.

Cita Chicago Style (17a ed.)

Grant, Lyle K., y Robert E. Spencer. The Personalized System of Instruction: Review and Applications to Distance Education. Athabasca University Press, 2003.

Cita MLA (8a ed.)

Grant, Lyle K., y Robert E. Spencer. The Personalized System of Instruction: Review and Applications to Distance Education. Athabasca University Press, 2003.