Levy, L. S., & Sampson, R. J. (1962). American economic development: Growth of the U. S. in the Western World. Allyn and Bacon.

Levy, Lester Samuel, and Roy J. Sampson. American Economic Development: Growth of the U. S. in the Western World. Boston: Allyn and Bacon, 1962.

Levy, Lester Samuel, and Roy J. Sampson. American Economic Development: Growth of the U. S. in the Western World. Allyn and Bacon, 1962.