APA-viite (7. p.)
Witham, S. Festive: The Art and Design of Promotional Mailing. RotoVision.
Chicago-viite (17. p.)
Witham, Scott. Festive: The Art and Design of Promotional Mailing. Sussex Oriental, Inglaterra: RotoVision.
MLA-viite (9. p.)
Witham, Scott. Festive: The Art and Design of Promotional Mailing. RotoVision.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.