Gaya APA
Lumsden, K. et al
(1982).
Microeconomics : a programmed book
(
4th ed)
.
Englewood Cliffs, NJ:
Prentice Hall.
Gaya MLA
Lumsden, Kith. et al.
"Microeconomics : a programmed book".
4th ed
Englewood Cliffs, NJ:
Prentice Hall,
1982.
Text.