APA-referens (7:e uppl.)

Aft, L. S. (1983). Productivity measurement and improvement. Reston Pub. Co.

Chicago-referens (17:e uppl.)

Aft, Lawrence S. Productivity Measurement and Improvement. Reston, Va: Reston Pub. Co, 1983.

MLA-referens (9:e uppl.)

Aft, Lawrence S. Productivity Measurement and Improvement. Reston Pub. Co, 1983.