Williams, G. R. (1968). Library cost models: Owning versus borrowing serial publications. Natioal Science Foundation, Office of Science Information Service.
芝加哥风格引文Williams, Gordon Ryerson. Library Cost Models: Owning Versus Borrowing Serial Publications. Washington, D.C.: Natioal Science Foundation, Office of Science Information Service, 1968.
MLA引文Williams, Gordon Ryerson. Library Cost Models: Owning Versus Borrowing Serial Publications. Natioal Science Foundation, Office of Science Information Service, 1968.
警告：这些引文格式不一定是100％准确.