APA引文

Helms, C. R. (1917). Agricultural credits in the United States.

Chicago Style (17th ed.) Citation

Helms, Connie Ray. Agricultural Credits in the United States. 1917.

MLA引文

Helms, Connie Ray. Agricultural Credits in the United States. 1917.

警告：这些引文格式不一定是100％准确.