(1968). Science for better living. Washington, D.C: United States Department of Agriculture.
استشهاد بنمط شيكاغوScience for Better Living. Washington, D.C: United States Department of Agriculture, 1968.
MLA استشهادScience for Better Living. Washington, D.C: United States Department of Agriculture, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.