APA (7th ed.) Citation

Boak, A. E. R., Hyma, A., & Slosson, P. The growth of European civilization. Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

Boak, Arthur Edward Romilly, Albert Hyma, and Preston Slosson. The Growth of European Civilization. New York [u.a.]: Appleton-Century-Crofts.

MLA (9th ed.) Citation

Boak, Arthur Edward Romilly, et al. The Growth of European Civilization. Appleton-Century-Crofts.