APA (7e ed.) Bronvermelding

Sawyer, W. W. (1961). What is calculus about? Mathematical Association of America.

Chicago (17e ed.) Bronvermelding

Sawyer, W. W. What Is Calculus About? Washington, D.C: Mathematical Association of America, 1961.

MLA (9e ed.) Bronvermelding

Sawyer, W. W. What Is Calculus About? Mathematical Association of America, 1961.