Cita APA (7th ed.)

Henderson, G. L., & Johnson, C. H. (1972). The four roles of mathematics: A liberal arts approach. Prindle, Weber & Schmidt.

Cita Chicago (17th ed.)

Henderson, George L., i Charles H. Johnson. The Four Roles of Mathematics: A Liberal Arts Approach. Boston: Prindle, Weber & Schmidt, 1972.

Cita MLA (8th ed.)

Henderson, George L., i Charles H. Johnson. The Four Roles of Mathematics: A Liberal Arts Approach. Prindle, Weber & Schmidt, 1972.