Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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