Παραπομπή σε μορφή APA (7η εκδ.)

Bird Malcolm. (1991). Improve your profits: Practical advice for the small-to-medium-sized business. Piatkus.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bird Malcolm. Improve Your Profits: Practical Advice for the Small-to-medium-sized Business. Piatkus, 1991.

Παραπομπή σε μορφή MLA (8th εκδ.)

Bird Malcolm. Improve Your Profits: Practical Advice for the Small-to-medium-sized Business. Piatkus, 1991.