APA (7th ed.) Zitazioa

Okun, M. A. (1982). Programs for older adults. Jossey-Bass Inc..

Chicago Style (17th ed.) Zitazioa

Okun, Morris A. Programs for Older Adults. San Francisco: Jossey-Bass Inc., 1982.

MLA (9th ed.) Zitazioa

Okun, Morris A. Programs for Older Adults. Jossey-Bass Inc., 1982.