APA引文

Hawley, E. W. (1981). Herbert Hoover as secretary of commerce: Studies in New Era thought and practice. University of Iowa.

芝加哥风格引文

Hawley, Elis W. Herbert Hoover as Secretary of Commerce: Studies in New Era Thought and Practice. IOWA: University of Iowa, 1981.

MLA引文

Hawley, Elis W. Herbert Hoover as Secretary of Commerce: Studies in New Era Thought and Practice. University of Iowa, 1981.

警告：这些引文格式不一定是100％准确.