| 1 | Leather Usage and Technology in the Old Age, Doç.Dr. Nuray YILDIZ, Marmara University Faculty of Arts and Sciences, 1993, İstanbul. |
| 2 | Applied Leather, Aziz ALPAUT, 1957, Ankara. |
| 3 | Turkish Leather Sector is 2400 Years Old, Hasan YELMEN, Derimod, 2005, İstanbul. |
| 4 | 50 Years in Kazlıçeşme, Hasan YELMEN, Ezgi Kitapevi Publications, 1992, İstanbul. |