Gaya APA
WALSTAD, W, B., BINGHAM, R, C. (2002).
Study guide to accompany economics, 15 edition (15).
New York:
McGraw Hill Book Company.
Gaya MLA
WALSTAD, William, B.., BINGHAM, Robert, C..
"Study guide to accompany economics, 15 edition".
15
New York:
McGraw Hill Book Company,
2002.
FAKULTAS EKONOMI.