APA (7th ed.) Citation

Hemminghaus, E. H. (1966). Mark Twain in Germany. AMS Press, inc..

Chicago Style (17th ed.) Citation

Hemminghaus, Edgar H. Mark Twain in Germany. New York: AMS Press, inc., 1966.

MLA (9th ed.) Citation

Hemminghaus, Edgar H. Mark Twain in Germany. AMS Press, inc., 1966.