APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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