Spears, H. (1951). Principles of teaching: Illus. Prentice-Hall.
Chicagoスタイル(17版)引用形式Spears, Harold. Principles of Teaching: Illus. New York: Prentice-Hall, 1951.
MLA(9版)引用形式Spears, Harold. Principles of Teaching: Illus. Prentice-Hall, 1951.
警告: この引用は必ずしも正確ではありません.