Citazione Stile APA (7a Edizione)

McClure, C. H., Scheck, C. C., Wright, W. W., & Seyfarth, F. (1938). The Middle Ages. Laidlaw brothers.

Citazione stile Chigago Style (17a edizione)

McClure, Clarence Henry, Charles Christian Scheck, Wendell William Wright, e Frederick Seyfarth. The Middle Ages. Chicago, [Ill.] [u.a.]: Laidlaw brothers, 1938.

Citatione MLA (9a ed.)

McClure, Clarence Henry, et al. The Middle Ages. Laidlaw brothers, 1938.