APA (7th ed.) Citation

Pen, J. (1966). Harmony and conflict in modern society. McGraw-Hill.

Chicago Style (17th ed.) Citation

Pen, Jan. Harmony and Conflict in Modern Society. New York: McGraw-Hill, 1966.

MLA (9th ed.) Citation

Pen, Jan. Harmony and Conflict in Modern Society. McGraw-Hill, 1966.