Witkowski, G. R., & Bauerkämper, A. (2020). German Philanthropy in Transatlantic Perspective. 1st ed. 2016. Springer International Publishing.
استشهاد بنمط شيكاغوWitkowski, Gregory R., و Arnd Bauerkämper. German Philanthropy in Transatlantic Perspective. 1st Ed. 2016. Springer International Publishing, 2020.
MLA استشهادWitkowski, Gregory R., و Arnd Bauerkämper. German Philanthropy in Transatlantic Perspective. 1st Ed. 2016. Springer International Publishing, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.