Rygle, K. J., & Pedersen, S. F. (2016). The treasure hunter's gem & mineral guides to the USA: Where & how to dig, pan, and mine your own gems & minerals (6th edition.). Gemstone Press.
Цитирование в стиле Чикаго (17-е изд.)Rygle, Kathy J., и Stephen F. Pedersen. The Treasure Hunter's Gem & Mineral Guides to the USA: Where & How to Dig, Pan, and Mine Your Own Gems & Minerals. 6th edition. Woodstock, Vermont: Gemstone Press, 2016.
Цитирование MLA (8-е изд.)Rygle, Kathy J., и Stephen F. Pedersen. The Treasure Hunter's Gem & Mineral Guides to the USA: Where & How to Dig, Pan, and Mine Your Own Gems & Minerals. 6th edition. Gemstone Press, 2016.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.