APA (7th ed.) Citation

Tough, A. (1991). Crucial questions about the future. Univ. Press of America.

Chicago Style (17th ed.) Citation

Tough, Allen. Crucial Questions About the Future. Lanham u.a: Univ. Press of America, 1991.

MLA (9th ed.) Citation

Tough, Allen. Crucial Questions About the Future. Univ. Press of America, 1991.