Παραπομπή σε μορφή APA (7η εκδ.)

Dudley, G. W., & Goodson, S. L. (1999). The psychology of sales call reluctance: Earning what you're worth in sales (4th ed., rev.). Behavioral Sciences Research Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Dudley, George W., και Shannon L. Goodson. The Psychology of Sales Call Reluctance: Earning What You're Worth in Sales. 4th ed., rev. Dallas: Behavioral Sciences Research Press, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Dudley, George W., και Shannon L. Goodson. The Psychology of Sales Call Reluctance: Earning What You're Worth in Sales. 4th ed., rev. Behavioral Sciences Research Press, 1999.