Dake, H. C. (1962). Northwest gem trails: A field guide for the gem hunter, mineral collector, and tourist, covering both popular and little known areas of Oregon, Washington, Idaho, British Columbia (3d ed. completely rev.). Gembooks.
Style de citation Chicago (17e éd.)Dake, H. C. Northwest Gem Trails: A Field Guide for the Gem Hunter, Mineral Collector, and Tourist, Covering Both Popular and Little Known Areas of Oregon, Washington, Idaho, British Columbia. 3d ed. completely rev. Mentone, Calif.: Gembooks, 1962.
Style de citation MLA (8e éd.)Dake, H. C. Northwest Gem Trails: A Field Guide for the Gem Hunter, Mineral Collector, and Tourist, Covering Both Popular and Little Known Areas of Oregon, Washington, Idaho, British Columbia. 3d ed. completely rev. Gembooks, 1962.
Attention : ces citations peuvent ne pas être correctes à 100%.