APA (7e ed.) Bronvermelding

COVEY STEPHEN R. THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE.

Chicago (17e ed.) Bronvermelding

COVEY STEPHEN R. THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE.

MLA (9e ed.) Bronvermelding

COVEY STEPHEN R. THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE.

Let op: Deze citaties zijn niet altijd 100% accuraat.