Hough, Lory (22 January 2019). "Study Skills: Daniel Haack". Harvard Graduate School of Education. Archived from the original on 2021-02-19. Retrieved 2019-09-04.
Hough, Lory (22 January 2019). "Study Skills: Daniel Haack". Harvard Graduate School of Education. Archived from the original on 2021-02-19. Retrieved 2019-09-04.