APA (7. basım) Alıntı

Ehlers, J. (2013). Otto von Freising: Joachim Ehlers. Beck.

Chicago Style (17. basım) Atıf

Ehlers, Joachim. Otto Von Freising: Joachim Ehlers. München: Beck, 2013.

MLA (8th ed.) Atıf

Ehlers, Joachim. Otto Von Freising: Joachim Ehlers. Beck, 2013.