Gaya APA
Schoenfeld, D., Natella, A, A. (1975).
The Consumer and His Dollars edisi 3 .
United States of America:
Oceana Publications.
Gaya MLA
Schoenfeld, DaVID., Natella, Arthur, A.
"The Consumer and His Dollars edisi 3".
United States of America:
Oceana Publications,
1975.
Text.