APA استشهاد

Williams, J. A. (1971). Themes of Islamic Civilization. University of California.

استشهاد بنمط شيكاغو

Williams, John Alden. Themes of Islamic Civilization. Berkeley: University of California, 1971.

MLA استشهاد

Williams, John Alden. Themes of Islamic Civilization. University of California, 1971.