Gaya APA

Swanson, C, P., Holland, J, L. (1985). Making vocational choices a theory of vocational personalities & work ì environments . New Jersey: Prentce-Hall.

Gaya MLA

Swanson, Carl, P.., Holland, John, L.. "Making vocational choices a theory of vocational personalities & work ì environments". New Jersey: Prentce-Hall, 1985. Text.