Παραπομπή σε μορφή APA (7η εκδ.)

Orr, L. M., & Orr, D. J. (2013). When to Hire—or Not Hire—a Consultant: Getting Your Money’s Worth from Consulting Relationships. Apress : Imprint: Apress.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Orr, Linda M., και Dave J. Orr. When to Hire—or Not Hire—a Consultant: Getting Your Money’s Worth from Consulting Relationships. Berkeley, CA: Apress : Imprint: Apress, 2013.

Παραπομπή σε μορφή MLA (8th εκδ.)

Orr, Linda M., και Dave J. Orr. When to Hire—or Not Hire—a Consultant: Getting Your Money’s Worth from Consulting Relationships. Apress : Imprint: Apress, 2013.