Gaya APA
Howard, Willard W.. (1971).
Contemporary economics (text).
Lexington:
DC. Heath and Company.
Gaya Chicago
Howard, Willard W..
Contemporary economics.
text
Lexington:
DC. Heath and Company,
1971.
.
Gaya MLA
Howard, Willard W..
Contemporary economics.
text
Lexington:
DC. Heath and Company,
1971.
.
Gaya Turabian
Howard, Willard W..
Contemporary economics.
text
Lexington:
DC. Heath and Company,
1971.
.