Apthorpe, R. (1973). Development indicators. Cooperative Regional Development Project, National Development Research Center.
Chicago-Zitierstil (17. Ausg.)Apthorpe, Raymond. Development Indicators. Quezon City: Cooperative Regional Development Project, National Development Research Center, 1973.
MLA-Zitierstil (9. Ausg.)Apthorpe, Raymond. Development Indicators. Cooperative Regional Development Project, National Development Research Center, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.