LUMSDEN, K. (1966). Microeconomics A Ppprogrammed Book Keith Lumsden, R. Attiyeh, George Leland Bach. Prentice-Hall.
Čikaški stil citiranja (17. izdanje)LUMSDEN, Keith. Microeconomics A Ppprogrammed Book Keith Lumsden, R. Attiyeh, George Leland Bach. Prentice-Hall, 1966.
MLA način citiranja (8. izdanje)LUMSDEN, Keith. Microeconomics A Ppprogrammed Book Keith Lumsden, R. Attiyeh, George Leland Bach. Prentice-Hall, 1966.
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