Beauchamp, W. L. (1951). Science Problems for junior High School 1. Chicago: Scott, Foresman and Company.
استشهاد بنمط شيكاغوBeauchamp, Wilbur L. Science Problems for Junior High School 1. Chicago: Scott, Foresman and Company, 1951.
MLA استشهادBeauchamp, Wilbur L. Science Problems for Junior High School 1. Chicago: Scott, Foresman and Company, 1951.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.