APA

MARCUM D., COVEY S. R., . (2002). BUSINESS THINK. NEW YORK: FRANKLIN COVEY.

Chicago

MARCUM DAVE, COVEY STEPHEN R, . 2002. BUSINESS THINK. NEW YORK: FRANKLIN COVEY.

Harvard

MARCUM D., COVEY S. R., . (2002). BUSINESS THINK. NEW YORK: FRANKLIN COVEY.

MLA

MARCUM DAVE, COVEY STEPHEN R, . BUSINESS THINK. NEW YORK: FRANKLIN COVEY. 2002.