APA استشهاد

Washington, C. C. T. Food and civilization, a symposium. voice of America forumlecture.

استشهاد بنمط شيكاغو

Washington, Charles C Thomas. Food and Civilization, a Symposium. Washington: voice of America forumlecture.

MLA استشهاد

Washington, Charles C Thomas. Food and Civilization, a Symposium. voice of America forumlecture.