Mayo, R. F. (1983). Washington State gold mines (Limited 1st ed.). Nugget Enterprises.
Cita Chicago Style (17a ed.)Mayo, Roy F. Washington State Gold Mines. Limited 1st ed. Enumclaw, WA. (P.O. Box 184, Enumclaw, WA. 98022): Nugget Enterprises, 1983.
Cita MLA (8a ed.)Mayo, Roy F. Washington State Gold Mines. Limited 1st ed. Nugget Enterprises, 1983.
Precaución: Estas citas no son 100% exactas.