Gaya APA
Roberts, M, L., Zahay, D. (2008).
Internet Marketing: Integrating Online and Offline Strategies (3).
USA:
South-Western.
Gaya MLA
Roberts, Mary, Lou., Zahay, Debra.
"Internet Marketing: Integrating Online and Offline Strategies".
3
USA:
South-Western,
2008.
Textbook.