Gaya APA
Byrns, R, T., Stone, G, W.
(1984).
Exploring economics
.
Glenview, Ill:
Scott, Poresman and Co..
Gaya MLA
Byrns, Ralph, T., Stone, Gerald, W..
"Exploring economics".
Glenview, Ill:
Scott, Poresman and Co.,
1984.
Text.