National School Boards Association. (1979). Math, science, and social studies curriculum: Retrospect and prospects. National School Boards Association.
Chicago-Zitierstil (17. Ausg.)National School Boards Association. Math, Science, and Social Studies Curriculum: Retrospect and Prospects. Washington, D.C: National School Boards Association, 1979.
MLA-Zitierstil (9. Ausg.)National School Boards Association. Math, Science, and Social Studies Curriculum: Retrospect and Prospects. National School Boards Association, 1979.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.