Cita APA (7th ed.)
Willoughby, S. S. Mathematics Education for a Changing World. Association for Supervision and Curriculum Development.
Cita Chicago (17th ed.)
Willoughby, Stephen S. Mathematics Education for a Changing World. Alexandria, EUA: Association for Supervision and Curriculum Development.
Cita MLA (9th ed.)
Willoughby, Stephen S. Mathematics Education for a Changing World. Association for Supervision and Curriculum Development.
Atenció: Aquestes cites poden no estar 100% correctes.