Barton, Laurie and Carolyn Dupaquier. Northstar 3: Reading and Writing. 5th ed., Pearson Education, 2019.
Tammet, Daniel. "A Genius Explains." Northstar 4: Reading and Writing, edited by Andrew K. English and Laura Monahon English, 5th ed., Pearson Education, 2019, pp. 7-9.