Cita APA (7th ed.)

Knowles, M. S. (1973). The adult learner: A neglected species. Gulf Pub. Co.

Cita Chicago (17th ed.)

Knowles, Malcolm Shepherd. The Adult Learner: A Neglected Species. Houston [Tex.]: Gulf Pub. Co, 1973.

Cita MLA (9th ed.)

Knowles, Malcolm Shepherd. The Adult Learner: A Neglected Species. Gulf Pub. Co, 1973.