Timemanagement volgens Covey

MLA

Covey, Stephen R., Roger Merrill, and Rebecca R Merrill. Timemanagement Volgens Covey. 6e ed. Amsterdam: Business contact, 2014.

APA

Covey, S. R., Merrill, R., & Merrill, R. R. (2014). Timemanagement volgens Covey. 6e ed. Amsterdam: Business contact.

Chicago

Covey, Stephen R., Roger Merrill, and Rebecca R. Merrill. Timemanagement Volgens Covey. 6e ed. Amsterdam: Business contact, 2014.