Apthorpe, R. (1973). Development indicators. Cooperative Regional Development Project, National Development Research Center, University of the Philippines.
Cita Chicago (17th ed.)Apthorpe, Raymond. Development Indicators. Quezon City: Cooperative Regional Development Project, National Development Research Center, University of the Philippines, 1973.
Cita MLA (9th ed.)Apthorpe, Raymond. Development Indicators. Cooperative Regional Development Project, National Development Research Center, University of the Philippines, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.