APA aipamena

Andress, J., & Winterfeld, S. (2014). Second Edition. Elsevier.

Chicago Style aipamena

Andress, Jason, và Steven Winterfeld. Second Edition. Elsevier, 2014.

MLA aipamena

Andress, Jason, và Steven Winterfeld. Second Edition. Elsevier, 2014.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.