Coloma, O. A. (1968). The Development of the developing countries (11th ed.). College of Agriculture, U.P.
Lua i Stíl Chicago (17ú heag.)Coloma, Othaniel A. The Development of the Developing Countries. 11th ed. [Los Banos, Laguna]: College of Agriculture, U.P, 1968.
Lua MLA (9ú heag.)Coloma, Othaniel A. The Development of the Developing Countries. 11th ed. College of Agriculture, U.P, 1968.
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