APA (7th ed.) Citation

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.

Chicago Style (17th ed.) Citation

Rygle, Kathy J., and 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.

MLA (8th ed.) Citation

Rygle, Kathy J., and 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.

Warning: These citations may not always be 100% accurate.