Callan, Tim (2011-04-23). "The now vs. not typo". Tim Callan on Marketing and Technology. Archived from the original on 2021-08-14. Retrieved 2021-08-13.
Callan, Tim (2011-04-23). "The now vs. not typo". Tim Callan on Marketing and Technology. Archived from the original on 2021-08-14. Retrieved 2021-08-13.