Kawalla, R. (2018). Resource efficient material and forming technologies: Meform 2018 : selected, peer reviewed papers from the 26th MEFORM conference, resource efficient materials and forming technologies, March 21-23, 2018, Freiberg, Germany. Scientific.Net.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kawalla, Rudolf. Resource Efficient Material and Forming Technologies: Meform 2018 : Selected, Peer Reviewed Papers from the 26th MEFORM Conference, Resource Efficient Materials and Forming Technologies, March 21-23, 2018, Freiberg, Germany. Zurich, Switzerland: Scientific.Net, 2018.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Kawalla, Rudolf. Resource Efficient Material and Forming Technologies: Meform 2018 : Selected, Peer Reviewed Papers from the 26th MEFORM Conference, Resource Efficient Materials and Forming Technologies, March 21-23, 2018, Freiberg, Germany. Scientific.Net, 2018.