Tripp. Field Guide to the Lichens of White Rocks. University Press of Colorado.
Cita Chicago (17th ed.)Tripp. Field Guide to the Lichens of White Rocks. University Press of Colorado.
Cita MLA (8th ed.)Tripp. Field Guide to the Lichens of White Rocks. University Press of Colorado.
Atenció: Aquestes cites poden no estar 100% correctes.