APA (7th ed.) Citation

Plumb, J. H., Ketchum, R. M., Bishop, M., Mattingly, G., & Clark, K. (1961). The horizon book of the Renaissance. American Heritage Pub. Co.

Chicago Style (17th ed.) Citation

Plumb, J. H., Richard M. Ketchum, Morris Bishop, Garrett Mattingly, and Kenneth Clark. The Horizon Book of the Renaissance. New York: American Heritage Pub. Co, 1961.

MLA (9th ed.) Citation

Plumb, J. H., et al. The Horizon Book of the Renaissance. American Heritage Pub. Co, 1961.