APA (7th ed.) Citation

United States. Department of the Interior. (1920). Opportunities for study of engineering at American higher institutions. GPO.

Chicago Style (17th ed.) Citation

United States. Department of the Interior. Opportunities for Study of Engineering at American Higher Institutions. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. Department of the Interior. Opportunities for Study of Engineering at American Higher Institutions. GPO, 1920.

Warning: These citations may not always be 100% accurate.