Doughlas, L. C. (1939). Disputed passage. Grosset and Dunlap.
Lua i Stíl Chicago (17ú heag.)Doughlas, Lloyd Cassel. Disputed Passage. New York: Grosset and Dunlap, 1939.
Lua MLA (9ú heag.)Doughlas, Lloyd Cassel. Disputed Passage. Grosset and Dunlap, 1939.
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