APA-viite (7. p.)
Henle, M. (2012). Which numbers are real? Mathematical Association of America.
Chicago-viite (17. p.)
Henle, Michael. Which Numbers Are Real? Washington, D.C.: Mathematical Association of America, 2012.
MLA-viite (9. p.)
Henle, Michael. Which Numbers Are Real? Mathematical Association of America, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.