Maryland Vegetable Growers' Association & University of Maryland Cooperative Extension Service. (1936). News letter. Maryland Vegetable Growers Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Maryland Vegetable Growers' Association و University of Maryland Cooperative Extension Service. News Letter. College Park, Md.: Maryland Vegetable Growers Association, 1936.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Maryland Vegetable Growers' Association و University of Maryland Cooperative Extension Service. News Letter. Maryland Vegetable Growers Association, 1936.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.