Bell, W. E. (1875). Carpentry made easy, or, The science and art of framing on a new and improved system: With specific instructions for building balloon frames, barn frames, mill frames, warehouses, church spires, etc., comprising also a system of bridge building, bills, estimates of cost, and valuable tables (2nd ed., enl. and improved.). H. Challen.
Chicago-referens (17:e uppl.)Bell, William E. Carpentry Made Easy, or, The Science and Art of Framing on a New and Improved System: With Specific Instructions for Building Balloon Frames, Barn Frames, Mill Frames, Warehouses, Church Spires, Etc., Comprising Also a System of Bridge Building, Bills, Estimates of Cost, and Valuable Tables. 2nd ed., enl. and improved. Philadelphia: H. Challen, 1875.
MLA-referens (8:e uppl.)Bell, William E. Carpentry Made Easy, or, The Science and Art of Framing on a New and Improved System: With Specific Instructions for Building Balloon Frames, Barn Frames, Mill Frames, Warehouses, Church Spires, Etc., Comprising Also a System of Bridge Building, Bills, Estimates of Cost, and Valuable Tables. 2nd ed., enl. and improved. H. Challen, 1875.