Cita APA (7a ed.)

Houle, C. O., Gould, S. B., & Summerskill, J. (1974). The external degree. Jossey-Bass.

Cita Chicago Style (17a ed.)

Houle, Cyril Orvin, Samuel B. Gould, y John Summerskill. The External Degree. San Francisco: Jossey-Bass, 1974.

Cita MLA (9a ed.)

Houle, Cyril Orvin, et al. The External Degree. Jossey-Bass, 1974.