National Association of State Directors of Teacher Education and Certification. (1963). Secondary school science and mathematics teachers. National Science Foundation.
Цитирование в стиле Чикаго (17-е изд.)National Association of State Directors of Teacher Education and Certification. Secondary School Science and Mathematics Teachers. Wash.: National Science Foundation, 1963.
Цитирование MLA (8-е изд.)National Association of State Directors of Teacher Education and Certification. Secondary School Science and Mathematics Teachers. National Science Foundation, 1963.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.