Goodapple, T. V., Weinand, R. J., & Maertz, W. R. (1983). German helmets 1933-1945. Terry Goodapple, William Maertz and Ronald Weinand.
Chicago Style (17th ed.) CitationGoodapple, T. V., R. J. Weinand, and W. R. Maertz. German Helmets 1933-1945. Quincy, Ill.: Terry Goodapple, William Maertz and Ronald Weinand, 1983.
MLA (9th ed.) CitationGoodapple, T. V., et al. German Helmets 1933-1945. Terry Goodapple, William Maertz and Ronald Weinand, 1983.
Warning: These citations may not always be 100% accurate.