Cita APA (7a ed.)

Fletcher, H., & Howell, A. A. (1972). Mathematics with understanding (First edition.). Pergamon Press.

Cita Chicago Style (17a ed.)

Fletcher, Harold, y Arnold A. Howell. Mathematics with Understanding. First edition. Oxford ; New York: Pergamon Press, 1972.

Cita MLA (8a ed.)

Fletcher, Harold, y Arnold A. Howell. Mathematics with Understanding. First edition. Pergamon Press, 1972.