APA (7th ed.) Zitazioa

Twente, E. E. (1970). Never too old: The aged in community life. Jossey Bass.

Chicago Style (17th ed.) Zitazioa

Twente, Esther E. Never Too Old: The Aged in Community Life. San francisco: Jossey Bass, 1970.

MLA (9th ed.) Zitazioa

Twente, Esther E. Never Too Old: The Aged in Community Life. Jossey Bass, 1970.