APA (7th ed.) Citation

Collier, P., & Horowitz, D. (1989). Second thoughts: Former radicals look back at the sixties. Madison books.

Chicago Style (17th ed.) Citation

Collier, Peter, and David Horowitz. Second Thoughts: Former Radicals Look Back at the Sixties. Lanham, MD: Madison books, 1989.

MLA (9th ed.) Citation

Collier, Peter, and David Horowitz. Second Thoughts: Former Radicals Look Back at the Sixties. Madison books, 1989.