FREEMAN, B. G. (1993). Management In Engineering Principles And Practice Gail Freeman Bell, James Blackwill. s.n.
Chicago-viite (17. p.)FREEMAN, Bell Gail. Management In Engineering Principles And Practice Gail Freeman Bell, James Blackwill. s.n, 1993.
MLA-viite (8. p.)FREEMAN, Bell Gail. Management In Engineering Principles And Practice Gail Freeman Bell, James Blackwill. s.n, 1993.
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