Allen E. Puckett. (1974). R & D productivity. California: Hughes.
Trích dẫn kiểu ChicagoAllen E. Puckett. R & D Productivity. California: Hughes, 1974.
MLA引文Allen E. Puckett. R & D Productivity. California: Hughes, 1974.
警告：这些引文格式不一定是100％准确.
APA引文