Gaya APA
TASSEL, R, C, V.
(1969).
ECONOMIC ESSENTIALS: A CORE APPROACH
.
Boston:
HOUGHTON MIFFLIN.
Gaya MLA
TASSEL, Roger, C., Van.
"ECONOMIC ESSENTIALS: A CORE APPROACH".
Boston:
HOUGHTON MIFFLIN,
1969.
Textbook.