APA (7th ed.) Citation

Hull, W. J., & Hull, R. W. (1967). The origin and development of the waterways policy of the United States. National Waterways Conference.

Chicago Style (17th ed.) Citation

Hull, William J., and Robert W. Hull. The Origin and Development of the Waterways Policy of the United States. Washington: National Waterways Conference, 1967.

MLA (9th ed.) Citation

Hull, William J., and Robert W. Hull. The Origin and Development of the Waterways Policy of the United States. National Waterways Conference, 1967.