Ergler, P. C. (1970). The role of contract engineering in technical manpower planning. American Management Association.
Lua i Stíl Chicago (17ú heag.)Ergler, Paul C. The Role of Contract Engineering in Technical Manpower Planning. [New York]: American Management Association, 1970.
Lua MLA (9ú heag.)Ergler, Paul C. The Role of Contract Engineering in Technical Manpower Planning. American Management Association, 1970.
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