Gaya APA
Byrns, R, T.
(1989).
Microeconomics
(
4th ed)
.
Glenview:
Foresman and Companyc.
Gaya MLA
Byrns, Ralph, T..
"Microeconomics".
4th ed
Glenview:
Foresman and Companyc,
1989.
Printed Book.