Παραπομπή σε μορφή APA (7η εκδ.)

Zook, C. (2004). Beyond the Core: Expand Your Market without Abandoning Your Roots. Harvard Business Review Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zook, Chris. Beyond the Core: Expand Your Market Without Abandoning Your Roots. Boston, Massachesutts: Harvard Business Review Press, 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Zook, Chris. Beyond the Core: Expand Your Market Without Abandoning Your Roots. Harvard Business Review Press, 2004.