Feher, J. (1966). Claus Spreckels: The sugar king in Hawaii. University of Hawaii Press.
Lua i Stíl Chicago (17ú heag.)Feher, Joseph. Claus Spreckels: The Sugar King in Hawaii. Honolulu: University of Hawaii Press, 1966.
Lua MLA (9ú heag.)Feher, Joseph. Claus Spreckels: The Sugar King in Hawaii. University of Hawaii Press, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.