Johnson, D. A. (1956). How to use field trips in mathematics. National Council of Teachers of Mathematics.
Style de citation Chicago (17e éd.)Johnson, Donovan A. How to Use Field Trips in Mathematics. Washington, D. C: National Council of Teachers of Mathematics, 1956.
Style de citation MLA (9e éd.)Johnson, Donovan A. How to Use Field Trips in Mathematics. National Council of Teachers of Mathematics, 1956.
Attention : ces citations peuvent ne pas être correctes à 100%.