APA (7th ed.) Citation

Shaffer, E. H. (1968). The oil import program of the United States. Praeger.

Chicago Style (17th ed.) Citation

Shaffer, Edward H. The Oil Import Program of the United States. London: Praeger, 1968.

MLA (9th ed.) Citation

Shaffer, Edward H. The Oil Import Program of the United States. Praeger, 1968.