Sorongon, A. P. (1955). A special study of landed estates in the Philippines: Analysis and findings. U.S. Operations Mission to the Philippines.
Lua i Stíl Chicago (17ú heag.)Sorongon, Arturo P. A Special Study of Landed Estates in the Philippines: Analysis and Findings. Manila: U.S. Operations Mission to the Philippines, 1955.
Lua MLA (9ú heag.)Sorongon, Arturo P. A Special Study of Landed Estates in the Philippines: Analysis and Findings. U.S. Operations Mission to the Philippines, 1955.
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