APA সাইটেশন

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

শিকাগো স্টাইলে সাইটেশন

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

এমএলএ সাইটেশন

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