Não informado. (1946). McGraw Hill digest: Engineering, industry, science, business. McGraw-Hill Publications.
Chicago-Zitierstil (17. Ausg.)Não informado. McGraw Hill Digest: Engineering, Industry, Science, Business. New York: McGraw-Hill Publications, 1946.
MLA-Zitierstil (8. Ausg.)Não informado. McGraw Hill Digest: Engineering, Industry, Science, Business. McGraw-Hill Publications, 1946.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.