Liebson, M. (2001). Direct stone sculpture: A guide to technique and creativity (Revised and expanded second edition.). Schiffer Publishing.
Citazione stile Chigago Style (17a edizione)Liebson, Milt. Direct Stone Sculpture: A Guide to Technique and Creativity. Revised and expanded second edition. Atglen, PA: Schiffer Publishing, 2001.
Citatione MLA (9a ed.)Liebson, Milt. Direct Stone Sculpture: A Guide to Technique and Creativity. Revised and expanded second edition. Schiffer Publishing, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.