Não informado. (2009). Mines and Mineral Statistics. Commissioner of Mineral Statistics of the State of Michigan.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Mines and Mineral Statistics. Lansing, Mich: Commissioner of Mineral Statistics of the State of Michigan, 2009.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Mines and Mineral Statistics. Commissioner of Mineral Statistics of the State of Michigan, 2009.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.