Cita APA

Hopke, W. E. (1972). encyclopedia of carrers and vocational guidance. J.G.Ferguson.

Citación estilo Chicago

Hopke, William E. Encyclopedia of Carrers and Vocational Guidance. Chicago: J.G.Ferguson, 1972.

Cita MLA

Hopke, William E. Encyclopedia of Carrers and Vocational Guidance. J.G.Ferguson, 1972.