Ople, B. F. (1981). Workers, managers, elites: The human spectrum of development. Institute of Labor and Manpower Studies.
Citace podle Chicago (17th ed.)Ople, Blas F. Workers, Managers, Elites: The Human Spectrum of Development. Manila: Institute of Labor and Manpower Studies, 1981.
Citace podle MLA (9th ed.)Ople, Blas F. Workers, Managers, Elites: The Human Spectrum of Development. Institute of Labor and Manpower Studies, 1981.
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