APA (7e ed.) Bronvermelding

(1987). The encyclopedia of careers and vocational guidance: Selecting a technician's career (7th ed.). J.G. Ferguson publishing co..

Chicago (17e ed.) Bronvermelding

The Encyclopedia of Careers and Vocational Guidance: Selecting a Technician's Career. 7th ed. Chicago: J.G. Ferguson publishing co., 1987.

MLA (9e ed.) Bronvermelding

The Encyclopedia of Careers and Vocational Guidance: Selecting a Technician's Career. 7th ed. J.G. Ferguson publishing co., 1987.