Παραπομπή σε μορφή APA (7η εκδ.)

Keen, P. G., & Ballance, C. (1997). On line profits: A managers guide to electronic commerce. Harvard Business School.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Keen, Peter G.W, και Craigg Ballance. On Line Profits: A Managers Guide to Electronic Commerce. Boston, Mass.: Harvard Business School, 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Keen, Peter G.W, και Craigg Ballance. On Line Profits: A Managers Guide to Electronic Commerce. Harvard Business School, 1997.