Pit & quarry handbook and buyers guide for the nonmetallic mineral industries. Pit and Quarry Publications, Inc. [etc.].
Chicago-referens (17:e uppl.)Pit & Quarry Handbook and Buyers Guide for the Nonmetallic Mineral Industries. Chicago: Pit and Quarry Publications, Inc. [etc.].
MLA-referens (8:e uppl.)Pit & Quarry Handbook and Buyers Guide for the Nonmetallic Mineral Industries. Pit and Quarry Publications, Inc. [etc.].
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.