TRUETT, L. J., & TRUETT, D. B. (1984). Managerial economics: Analisys, problems, cases (2.). South-western.
Lua i Stíl Chicago (17ú heag.)TRUETT, Lila J., agus Dale B. TRUETT. Managerial Economics: Analisys, Problems, Cases. 2. Cincinati: South-western, 1984.
Lua MLA (9ú heag.)TRUETT, Lila J., agus Dale B. TRUETT. Managerial Economics: Analisys, Problems, Cases. 2. South-western, 1984.
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