APA-čujuhus (7. p.)

LUMSDEN, K. (1966). Microeconomics; a programmed book.

Chicago-čujuhus (17. p.)

LUMSDEN, Keith. Microeconomics; a Programmed Book. Englewood Cliffs, 1966.

MLA-čujuhus (9. p.)

LUMSDEN, Keith. Microeconomics; a Programmed Book. 1966.

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