Παραπομπή APA

Laird, D. A., & Laird, E. C. (1952). Practical sales psychology. Mcgraw-Hill.

Παραπομπή Chicago Style

Laird, Donald A., και Eleanor C. Laird. Practical Sales Psychology. London: Mcgraw-Hill, 1952.

Παραπομπή MLA

Laird, Donald A., και Eleanor C. Laird. Practical Sales Psychology. Mcgraw-Hill, 1952.