APA (7e ed.) Bronvermelding

Bell, M. (1980). The salesman in the field: Conditions of work and employment of commercial travellers and representatives. International Labour Office.

Chicago (17e ed.) Bronvermelding

Bell, Michael. The Salesman in the Field: Conditions of Work and Employment of Commercial Travellers and Representatives. Geneva: International Labour Office, 1980.

MLA (8e ed.) Bronvermelding

Bell, Michael. The Salesman in the Field: Conditions of Work and Employment of Commercial Travellers and Representatives. International Labour Office, 1980.