National Association of State Directors of Teacher Education and Certification. (1963). Secondary school science and mathematics teachers. National Science Foundation.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)National Association of State Directors of Teacher Education and Certification. Secondary School Science and Mathematics Teachers. Wash.: National Science Foundation, 1963.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)National Association of State Directors of Teacher Education and Certification. Secondary School Science and Mathematics Teachers. National Science Foundation, 1963.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.