Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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