APA (7th ed.) Citation

Gittler, J. B., & Collier, J. (1956). Understanding minority groups. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Gittler, Joseph Bertram, and John Collier. Understanding Minority Groups. London [etc.]: John Wiley & Sons, 1956.

MLA (9th ed.) Citation

Gittler, Joseph Bertram, and John Collier. Understanding Minority Groups. John Wiley & Sons, 1956.