توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Krieghbaum, H. (1969). An Investment in Knowledge: The first dozen years of the National Science Foundation's summer institutes programs to improve secondary shool science and mathematics teaching, 1954-1965. Univ.Pr..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Krieghbaum, Hillier. An Investment in Knowledge: The First Dozen Years of the National Science Foundation's Summer Institutes Programs to Improve Secondary Shool Science and Mathematics Teaching, 1954-1965. NewYork: Univ.Pr., 1969.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Krieghbaum, Hillier. An Investment in Knowledge: The First Dozen Years of the National Science Foundation's Summer Institutes Programs to Improve Secondary Shool Science and Mathematics Teaching, 1954-1965. Univ.Pr., 1969.