Roosevelt, N. 1. (1933). The Philippines: A treasure and a problem. J.H. Sears.
Lua i Stíl Chicago (17ú heag.)Roosevelt, Nicholas 1893. The Philippines: A Treasure and a Problem. New York: J.H. Sears, 1933.
Lua MLA (9ú heag.)Roosevelt, Nicholas 1893. The Philippines: A Treasure and a Problem. J.H. Sears, 1933.
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