Gaya APA

Holland, J, L. (1985). Making vocational choices : a theory of vocational personalities and work environments (2nd ed). Englewood Cliffs, NJ: Prentice Hall.

Gaya MLA

Holland, John, L.. "Making vocational choices : a theory of vocational personalities and work environments". 2nd ed Englewood Cliffs, NJ: Prentice Hall, 1985. Text.