Citazione Stile APA (7a Edizione)

Holt, R., & Geiger, E. J. (1974). George Washington Carver: A great American Negro teacher. Dell Publishing Co.

Citazione stile Chigago Style (17a edizione)

Holt, Rackham, e Elizabeth J. Geiger. George Washington Carver: A Great American Negro Teacher. New York: Dell Publishing Co, 1974.

Citatione MLA (9a ed.)

Holt, Rackham, e Elizabeth J. Geiger. George Washington Carver: A Great American Negro Teacher. Dell Publishing Co, 1974.