Παραπομπή σε μορφή APA (7η εκδ.)

Norlin, G., & Ellsworth, R. E. (1985). A voice from Colorado's past for the present: Selected writings of George Norlin. Colorado Associated University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Norlin, George, και Ralph E. Ellsworth. A Voice from Colorado's Past for the Present: Selected Writings of George Norlin. Boulder, Colo.: Colorado Associated University Press, 1985.

Παραπομπή σε μορφή MLA (8th εκδ.)

Norlin, George, και Ralph E. Ellsworth. A Voice from Colorado's Past for the Present: Selected Writings of George Norlin. Colorado Associated University Press, 1985.