Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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