Cita APA (7th ed.)

Ople, B. F. Proposals for further development: Manpower planning ; vocational and career guidance. s.n.].

Cita Chicago (17th ed.)

Ople, Blas F. Proposals for Further Development: Manpower Planning ; Vocational and Career Guidance. [S.l: s.n.].

Cita MLA (9th ed.)

Ople, Blas F. Proposals for Further Development: Manpower Planning ; Vocational and Career Guidance. s.n.].