APA (7th ed.) Citation

Beard, C. A., Smith, G. H. E., Vagts, A., & Beard, W. (1966). The idea of national interest: An analytical study in American foreign policy. Quadrangle Books.

Chicago Style (17th ed.) Citation

Beard, Charles Austin, George Howard Edward Smith, Alfred Vagts, and William Beard. The Idea of National Interest: An Analytical Study in American Foreign Policy. Chicago: Quadrangle Books, 1966.

MLA (9th ed.) Citation

Beard, Charles Austin, et al. The Idea of National Interest: An Analytical Study in American Foreign Policy. Quadrangle Books, 1966.