Wirdenius, H. (1958). Supervisors at work: Description of supervisor behavior, development of a time-sampling observation method. Swedish Council for Personnel Administration.
Chicago-referens (17:e uppl.)Wirdenius, Hans. Supervisors at Work: Description of Supervisor Behavior, Development of a Time-sampling Observation Method. Stockholm: Swedish Council for Personnel Administration, 1958.
MLA-referens (8:e uppl.)Wirdenius, Hans. Supervisors at Work: Description of Supervisor Behavior, Development of a Time-sampling Observation Method. Swedish Council for Personnel Administration, 1958.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.