APA-referens (7:e uppl.)
Abrams, B. (2000). The observational research handbook: Understanding how consumers live with your product. NTC Business Books.
Chicago-referens (17:e uppl.)
Abrams, Bill. The Observational Research Handbook: Understanding How Consumers Live with Your Product. Illinois: NTC Business Books, 2000.
MLA-referens (9:e uppl.)
Abrams, Bill. The Observational Research Handbook: Understanding How Consumers Live with Your Product. NTC Business Books, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.