APA-viite (7. p.)

PALMER HELEN. (1998). ENNEAGRAM ADVANTAGE: PUTTING THE 9 PERSONALITY TYPES--------------IN THE OFFICE. HARMONY BOOKS.

Chicago-viite (17. p.)

PALMER HELEN. ENNEAGRAM ADVANTAGE: PUTTING THE 9 PERSONALITY TYPES--------------IN THE OFFICE. NEW YORK: HARMONY BOOKS, 1998.

MLA-viite (9. p.)

PALMER HELEN. ENNEAGRAM ADVANTAGE: PUTTING THE 9 PERSONALITY TYPES--------------IN THE OFFICE. HARMONY BOOKS, 1998.