Sackman, H. (1973). Preliminary investigation of real-world problem solving with and without computers. The Rand Corporation.
Παραπομπή σε μορφή Chicago (17η εκδ.)Sackman, Harold. Preliminary Investigation of Real-world Problem Solving with and Without Computers. Sta. Monica, Ca: The Rand Corporation, 1973.
Παραπομπή σε μορφή MLA (9th εκδ.)Sackman, Harold. Preliminary Investigation of Real-world Problem Solving with and Without Computers. The Rand Corporation, 1973.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.