Cita APA (7a ed.)

Johnson, D. A. (1956). How to use field trips in mathematics. National Council of Teachers of Mathematics.

Cita Chicago Style (17a ed.)

Johnson, Donovan A. How to Use Field Trips in Mathematics. Washington, D. C: National Council of Teachers of Mathematics, 1956.

Cita MLA (9a ed.)

Johnson, Donovan A. How to Use Field Trips in Mathematics. National Council of Teachers of Mathematics, 1956.