Tolong jelaskan mengenai Sumber dari Qian Xuesen

Chang, Iris (1995). Thread of the Silkworm. Perseus Books Group. ISBN 978-0-465-08716-7.

O'Donnell, Franklin (2002). JPL 101 . California Institute of Technology. JPL 400-1048.

Harvey, Brian (2004). China's Space Program: From Conception to Manned Spaceflight. Springer-Verlag. ISBN 978-1-85233-566-3.