APA (7th ed.) Citation

Calleo, D. P. (1965). Europe's future: The grand alternatives. Horizon Pr.

Chicago Style (17th ed.) Citation

Calleo, David P. Europe's Future: The Grand Alternatives. New York: Horizon Pr, 1965.

MLA (9th ed.) Citation

Calleo, David P. Europe's Future: The Grand Alternatives. Horizon Pr, 1965.