Não informado. (2020). Report of the State Mineralogist. California Division of Mines.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Report of the State Mineralogist. San Francisco, Calif: California Division of Mines, 2020.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Report of the State Mineralogist. California Division of Mines, 2020.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.