Gaya APA
L., L, J., H.A, B. (1976).
Theory and Problems of Introduction to Business (Cetakan Pertama).
new york:
McGraw-Hill Book Company.
Gaya MLA
L., Lerner, Joel., H.A, Baker.
"Theory and Problems of Introduction to Business".
Cetakan Pertama
new york:
McGraw-Hill Book Company,
1976.
Text.