APA (7th ed.) Zitazioa

Willoughby, S. S. (1990). Mathematics education for a changing world. ASCD.

Chicago Style (17th ed.) Zitazioa

Willoughby, Stephen S. Mathematics Education for a Changing World. Alexandria: ASCD, 1990.

MLA (9th ed.) Zitazioa

Willoughby, Stephen S. Mathematics Education for a Changing World. ASCD, 1990.