APA (7th ed.) Zitazioa

Maas, H. S., & Kuypers, J. A. (1974). From thirty to seventy. Jossey-Bass.

Chicago Style (17th ed.) Zitazioa

Maas, Henry S., eta Joseph A. Kuypers. From Thirty to Seventy. San Francisco: Jossey-Bass, 1974.

MLA (9th ed.) Zitazioa

Maas, Henry S., eta Joseph A. Kuypers. From Thirty to Seventy. Jossey-Bass, 1974.