Perdew, L., & Rauch, M. (2019). Crazy contraptions: Build Rube Goldberg machines that swoop, spin, stack, and swivel : with hands on engineering activities. Nomad Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Perdew, Laura, و Micah Rauch. Crazy Contraptions: Build Rube Goldberg Machines That Swoop, Spin, Stack, and Swivel : With Hands on Engineering Activities. White River Junction, VT: Nomad Press, 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Perdew, Laura, و Micah Rauch. Crazy Contraptions: Build Rube Goldberg Machines That Swoop, Spin, Stack, and Swivel : With Hands on Engineering Activities. Nomad Press, 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.