Não informado. (1919). Cement, Mill and Quarry. National Trade Journals.
Chicago-Zitierstil (17. Ausg.)Não informado. Cement, Mill and Quarry. New York: National Trade Journals, 1919.
MLA-Zitierstil (8. Ausg.)Não informado. Cement, Mill and Quarry. National Trade Journals, 1919.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.