Romaine, G. (2020). Rocks, gems, and minerals (Third edition.). FalconGuides.
Cita Chicago Style (17a ed.)Romaine, Garret. Rocks, Gems, and Minerals. Third edition. Guilford, Connecticut: FalconGuides, 2020.
Cita MLA (8a ed.)Romaine, Garret. Rocks, Gems, and Minerals. Third edition. FalconGuides, 2020.
Precaución: Estas citas no son 100% exactas.