APA引文

(1938). Circular. University of Arkansas, College of Agriculture : [U.S. Dept. of Agriculture, cooperating].

Chicago Style (17th ed.) Citation

Circular. [Little Rock, Ark.]: University of Arkansas, College of Agriculture : [U.S. Dept. of Agriculture, cooperating], 1938.

MLA引文

Circular. University of Arkansas, College of Agriculture : [U.S. Dept. of Agriculture, cooperating], 1938.

警告：这些引文格式不一定是100％准确.