Cita APA (7th ed.)

Honsberger, R. (1970). Ingenuity in mathematics. Mathematical Association of America.

Cita Chicago (17th ed.)

Honsberger, Ross. Ingenuity in Mathematics. Washington, DC: Mathematical Association of America, 1970.

Cita MLA (9th ed.)

Honsberger, Ross. Ingenuity in Mathematics. Mathematical Association of America, 1970.