Gaya APA
Sampson, R, J., Marienhoff, I. (1985).
The american economy: analysis issue principles (2nd ed).
Boston:
Houghton Mifflin Company.
Gaya MLA
Sampson, Roy, J.., Marienhoff, Ira.
"The american economy: analysis issue principles".
2nd ed
Boston:
Houghton Mifflin Company,
1985.
Printed Book.