MARKLAND, R. E. (1983). Topics In Management Science Third Edition/ Robert E. Markland. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)MARKLAND, Robert E. Topics In Management Science Third Edition/ Robert E. Markland. John Wiley & Sons, 1983.
Lua MLA (8ú heag.)MARKLAND, Robert E. Topics In Management Science Third Edition/ Robert E. Markland. John Wiley & Sons, 1983.
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