Gaya APA
Robinson, R.
(1980).
Study Guide to Accompany Samuelson: Economics Ed. 11
(
Ke-11)
.
Amerika:
McGraw Hill.
Gaya MLA
Robinson, Romney.
"Study Guide to Accompany Samuelson: Economics Ed. 11".
Ke-11
Amerika:
McGraw Hill,
1980.
Text.