https://community.articulate.com/articles/blooms-taxonomy-elearning-instructional-design

http://www.nwlink.com/~donclark/hrd/bloom.html

http://teaching.uncc.edu/learning-resources/articles-books/best-practice/goals-objectives/writing-objectives

http://www.celt.iastate.edu/teaching-resources/effective-practice/revised-blooms-taxonomy/

https://cft.vanderbilt.edu/guides-sub-pages/blooms-taxonomy/#1956