APA-viite (7. p.)

Butler, C. H., & Wren, F. L. (1951). The teaching of secondary mathematics (2d ed.). McGraw-Hill.

Chicago-viite (17. p.)

Butler, Charles H., ja Frank Lynwood Wren. The Teaching of Secondary Mathematics. 2d ed. New York: McGraw-Hill, 1951.

MLA-viite (9. p.)

Butler, Charles H., ja Frank Lynwood Wren. The Teaching of Secondary Mathematics. 2d ed. McGraw-Hill, 1951.