Lumsden, K. G. (1967). New developments in the teaching of economics. Prentice-Hall.
Chicago-čujuhus (17. p.)Lumsden, Keith G. New Developments in the Teaching of Economics. New Jersey: Prentice-Hall, 1967.
MLA-čujuhus (9. p.)Lumsden, Keith G. New Developments in the Teaching of Economics. Prentice-Hall, 1967.
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