APA引文

Gruber, H. (1967). International communism in the era of Lenin. New York: Fawcett Publications, Inc.

Trích dẫn kiểu Chicago

Gruber, Helmut. International Communism in the Era of Lenin. New York: Fawcett Publications, Inc, 1967.

MLA引文

Gruber, Helmut. International Communism in the Era of Lenin. New York: Fawcett Publications, Inc, 1967.

警告：这些引文格式不一定是100％准确.