Udell, G. G. (1960). Naturalization laws, May 9, 1918-Sept. 22, 1959. Government Print. Off.
芝加哥风格引文Udell, Gilman G. Naturalization Laws, May 9, 1918-Sept. 22, 1959. Washington: Government Print. Off, 1960.
MLA引文Udell, Gilman G. Naturalization Laws, May 9, 1918-Sept. 22, 1959. Government Print. Off, 1960.
警告：这些引文格式不一定是100％准确.