Stack, L. (2013). Creating a time management system that works for you: Paper, electronic, or hybrid? The Productivity Pro, Inc.
Chicago-Zitierstil (17. Ausg.)Stack, Laura. Creating a Time Management System That Works for You: Paper, Electronic, or Hybrid? Highlands Ranch: The Productivity Pro, Inc, 2013.
MLA-Zitierstil (9. Ausg.)Stack, Laura. Creating a Time Management System That Works for You: Paper, Electronic, or Hybrid? The Productivity Pro, Inc, 2013.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.