Graebner William, & Richards Leonard. (2006). American Record (Tái bản lần thứ 5.). American: Mc Graw Hill.
শিকাগো স্টাইলে সাইটেশনGraebner William, এবং Richards Leonard. American Record. Tái bản lần thứ 5. American: Mc Graw Hill, 2006.
এমএলএ সাইটেশনGraebner William, এবং Richards Leonard. American Record. Tái bản lần thứ 5. American: Mc Graw Hill, 2006.
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