Lessenberry, D. D. (1944). Business Typewriting: A Self-Teaching Course, Based on 20th Century Typewriting. By D. D. Lessenberg. U. S. Armed Forces Institute.
Chicago-Zitierstil (17. Ausg.)Lessenberry, D. D. Business Typewriting: A Self-Teaching Course, Based on 20th Century Typewriting. By D. D. Lessenberg. (Madison): U. S. Armed Forces Institute, 1944.
MLA-Zitierstil (9. Ausg.)Lessenberry, D. D. Business Typewriting: A Self-Teaching Course, Based on 20th Century Typewriting. By D. D. Lessenberg. U. S. Armed Forces Institute, 1944.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.