William E Hopke. (1976). Encyclopaedia of careers and vocational guidance- Rev-Ed.- 2 vol. JC Ferguson publishing co.
Chicago Edition CitationWilliam E Hopke. Encyclopaedia of Careers and Vocational Guidance- Rev-Ed.- 2 Vol. Chicago: JC Ferguson publishing co, 1976.
MLA Edition CitationWilliam E Hopke. Encyclopaedia of Careers and Vocational Guidance- Rev-Ed.- 2 Vol. JC Ferguson publishing co, 1976.
Warning: These citations may not always be 100% accurate.