Thorpe, M., & Grugeon, D. (1987). Open learning for adults. Longman.
Cita Chicago Style (17a ed.)Thorpe, Mary, y David Grugeon. Open Learning for Adults. [London]: Longman, 1987.
Cita MLA (9a ed.)Thorpe, Mary, y David Grugeon. Open Learning for Adults. Longman, 1987.
Precaución: Estas citas no son 100% exactas.