Butts, D. (1974). Teaching of science: A self-directed planning guide. Harper and Row.
استشهاد بنمط شيكاغوButts, David. Teaching of Science: A Self-directed Planning Guide. New York: Harper and Row, 1974.
MLA استشهادButts, David. Teaching of Science: A Self-directed Planning Guide. Harper and Row, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.