Encyclopaedia of science. (1977). Readers guide to the McGraw Hill encyclopaedia of science and technology. Mc Graw Hill Book company Inc.
استشهاد بنمط شيكاغوEncyclopaedia of science. Readers Guide to the McGraw Hill Encyclopaedia of Science and Technology. Mc Graw Hill Book company Inc, 1977.
MLA استشهادEncyclopaedia of science. Readers Guide to the McGraw Hill Encyclopaedia of Science and Technology. Mc Graw Hill Book company Inc, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.