Παραπομπή APA

Goodfriend, J. (2006). Gateway to higher mathematics. Jones and Bartlett Publishers.

Παραπομπή Chicago Style

Goodfriend, Jason. Gateway to Higher Mathematics. Boston: Jones and Bartlett Publishers, 2006.

Παραπομπή MLA

Goodfriend, Jason. Gateway to Higher Mathematics. Jones and Bartlett Publishers, 2006.