Não informado. (1931). Mineralogist. Oregon Agate and Mineral Society.
Style de citation Chicago (17e éd.)Não informado. Mineralogist. Portland, Ore: Oregon Agate and Mineral Society, 1931.
Style de citation MLA (8e éd.)Não informado. Mineralogist. Oregon Agate and Mineral Society, 1931.
Attention : ces citations peuvent ne pas être correctes à 100%.