APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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