Wilson, A. (1961). The old men at the zoo. Seeker & Warburg.
芝加哥风格引文Wilson, Angus. The Old Men at the Zoo. London: Seeker & Warburg, 1961.
MLA引文Wilson, Angus. The Old Men at the Zoo. Seeker & Warburg, 1961.
警告：这些引文格式不一定是100％准确.
APA引文