Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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