Manktelow, J. Manage your time: Control your workload and make time for success. Dorling Kindersley.
Chicago-viite (17. p.)Manktelow, James. Manage Your Time: Control Your Workload and Make Time for Success. Dorling Kindersley.
MLA-viite (9. p.)Manktelow, James. Manage Your Time: Control Your Workload and Make Time for Success. Dorling Kindersley.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.