APA (7th ed.) Citation

Pen, J., & Preston, T. S. (1965). Harmony and conflict in modern society. McGraw-Hill.

Chicago Style (17th ed.) Citation

Pen, Jan, and Trevor S. Preston. Harmony and Conflict in Modern Society. London: McGraw-Hill, 1965.

MLA (8th ed.) Citation

Pen, Jan, and Trevor S. Preston. Harmony and Conflict in Modern Society. McGraw-Hill, 1965.