Women in science, 50 fearless pioneers who changed the world, 2016: ECIP t.p. (Rachel Ignotofsky) at About the author, at end of galley, after glossary (Kansas City, Mo.)

LC copyright database, Feb. 18, 2016 (hdg.: Ignotofsky, Rachel, 1989- ; Kansas City, MO)

Women in art, 2019: ECIP t.p. (Rachel Ignotofsky) data view (June 20, 1989)

Rachel Ignotofsky's personal website, February 14, 2020: (Rachel Ignotofsky is a New York Times Best Selling author and illustrator, based in beautiful Los Angeles. She grew up in New Jersey; She graduated from Tyler School of Art in 2011) https://www.rachelignotofskydesign.com/