Berg, H. D., Layman, M. E., Ferguson, W. K., & Bruun, G. (1958). Student's manual to accompany A Survey of European Civilization (3rd ed.). Houghton Mifflin.

Berg, Harry D., Martha E. Layman, Wallace K. Ferguson, and Geoffrey Bruun. Student's Manual to Accompany A Survey of European Civilization. 3rd ed. Boston: Houghton Mifflin, 1958.

Berg, Harry D., et al. Student's Manual to Accompany A Survey of European Civilization. 3rd ed. Houghton Mifflin, 1958.