Ojanpa, Brian (2011-08-12). "Road T.P. was his idea that stuck". Mankato Free Press. Mankato, Minnesota. Diarkibkan daripada yang asal pada 2020-02-26. Dicapai pada 2017-09-22.
Ojanpa, Brian (2011-08-12). "Road T.P. was his idea that stuck". Mankato Free Press. Mankato, Minnesota. Diarkibkan daripada yang asal pada 2020-02-26. Dicapai pada 2017-09-22.