Gaya APA
Byrns, R, T., Stone, G, W.
(1984).
Economics
(
2nd ed)
.
Glenview Illinois:
Scott Foresman and Company.
Gaya MLA
Byrns, Ralph, T.., Stone, Gerald, W..
"Economics".
2nd ed
Glenview Illinois:
Scott Foresman and Company,
1984.
Printed Book.