Watt, W. M., & Welch, A. T. (1980). Der Islam. Der Islam.
Chicago Style (17th ed.) CitationWatt, William Montgomery, and Alford T. Welch. "Der Islam." Der Islam 1980.
MLA (8th ed.) CitationWatt, William Montgomery, and Alford T. Welch. "Der Islam." Der Islam, 1980.
Warning: These citations may not always be 100% accurate.