Knudsen, K., & La Doux, T. (2005). Lichen flora of the Southwestern Mojave Desert: Key's Ranch, Joshua Tree National Park, San Bernardino County, California, USA. Zenodo.
Cita Chicago (17th ed.)Knudsen, Kerry, i Tasha La Doux. Lichen Flora of the Southwestern Mojave Desert: Key's Ranch, Joshua Tree National Park, San Bernardino County, California, USA. Zenodo, 2005.
Cita MLA (9th ed.)Knudsen, Kerry, i Tasha La Doux. Lichen Flora of the Southwestern Mojave Desert: Key's Ranch, Joshua Tree National Park, San Bernardino County, California, USA. Zenodo, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.