Wirdenius, H. (1958). Supervisors at work: Description of supervisor behavior, development of a time-sampling observation method. Swedish Council for Personnel Administration.
Lua i Stíl Chicago (17ú heag.)Wirdenius, Hans. Supervisors at Work: Description of Supervisor Behavior, Development of a Time-sampling Observation Method. Stockholm: Swedish Council for Personnel Administration, 1958.
Lua MLA (8ú heag.)Wirdenius, Hans. Supervisors at Work: Description of Supervisor Behavior, Development of a Time-sampling Observation Method. Swedish Council for Personnel Administration, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.