The Gold mines of California;
two guidebooks.
APA Citation
Street, F., Robinson, F. (1973). The Gold mines of California: two guidebooks. New York: Arno Press.
MLA Citation
Street, Franklin, and Fayette Robinson. The Gold Mines of California: Two Guidebooks. New York: Arno Press, 1973.
Warning: These citations may not always be complete (especially for serials).