APA (7e ed.) Bronvermelding

Sobel, I., & Wilcock, R. C. (1966). Placement techniques for older workers. Organisation for Economic Cooperation and Development, Manpower and Social Affairs Directorate, Social Affairs Division.

Chicago (17e ed.) Bronvermelding

Sobel, Irvin, en Richard C. Wilcock. Placement Techniques for Older Workers. [Paris]: Organisation for Economic Cooperation and Development, Manpower and Social Affairs Directorate, Social Affairs Division, 1966.

MLA (8e ed.) Bronvermelding

Sobel, Irvin, en Richard C. Wilcock. Placement Techniques for Older Workers. Organisation for Economic Cooperation and Development, Manpower and Social Affairs Directorate, Social Affairs Division, 1966.