Cita APA (7th ed.)

Hunnicutt, C. W., & Iverson, W. J. (1958). Research in the three R's. Harper.

Cita Chicago (17th ed.)

Hunnicutt, C. W., i William J. Iverson. Research in the Three R's. New York: Harper, 1958.

Cita MLA (8th ed.)

Hunnicutt, C. W., i William J. Iverson. Research in the Three R's. Harper, 1958.