APA (7e ed.) Bronvermelding

Não informado. (1952). Work study. Institute of Industrial Technicians.

Chicago (17e ed.) Bronvermelding

Não informado. Work Study. London: Institute of Industrial Technicians, 1952.

MLA (8e ed.) Bronvermelding

Não informado. Work Study. Institute of Industrial Technicians, 1952.

Let op: Deze citaties zijn niet altijd 100% accuraat.