Unknown creator; St. Louis University; Parks College of Saint Louis University. (1943). Students at Parks College provide line service.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Unknown creator; St. Louis University; Parks College of Saint Louis University. Students at Parks College Provide Line Service. 1943.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Unknown creator; St. Louis University; Parks College of Saint Louis University. Students at Parks College Provide Line Service. 1943.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.