Earl, B. (1963). Groups and fields: A programmed unit in modern education ed by J William Moore and Wendell I Smith.
استشهاد بنمط شيكاغوEarl, Boyd. Groups and Fields: A Programmed Unit in Modern Education Ed by J William Moore and Wendell I Smith. 1963.
MLA استشهادEarl, Boyd. Groups and Fields: A Programmed Unit in Modern Education Ed by J William Moore and Wendell I Smith. 1963.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.