Heinemann, P. G. (1919). Milk. W.B. Saunders Co..
Lua i Stíl Chicago (17ú heag.)Heinemann, Paul Gustav. Milk. Philadelphia and London: W.B. Saunders Co., 1919.
Lua MLA (8ú heag.)Heinemann, Paul Gustav. Milk. W.B. Saunders Co., 1919.
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