Apthorpe, R. (1973). Development indicators. Cooperative Regional Development Project, National Development Research Center.
Citace podle Chicago (17th ed.)Apthorpe, Raymond. Development Indicators. Quezon City: Cooperative Regional Development Project, National Development Research Center, 1973.
Citace podle MLA (9th ed.)Apthorpe, Raymond. Development Indicators. Cooperative Regional Development Project, National Development Research Center, 1973.
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