Gaya APA
KOONTZ, H., FULMER, R, M. (1981).
A PRACTICAL INTRODUCTION TO BUSINESS .
HOMEWOOD, ILLINOIS:
Richard D. Irwin.
Gaya MLA
KOONTZ, Harold., FULMER, Robert, M..
"A PRACTICAL INTRODUCTION TO BUSINESS".
HOMEWOOD, ILLINOIS:
Richard D. Irwin,
1981.
Textbook.