Gaya APA
Hellman, K., Burst, A. (2004).
The Customer Learning Curve; Creating Profits From Marketing Chaos .
USE:
Thomson South-Western.
Gaya MLA
Hellman, Karl., Burst, Ardis.
"The Customer Learning Curve; Creating Profits From Marketing Chaos".
USE:
Thomson South-Western,
2004.
Textbook.