APA (7th ed.) Citation

United States. Information Agency, Voice of America (Organization), & Heald, H. T. (1970). The world of the engineer. Voice of America, United States Information Agency.

Chicago Style (17th ed.) Citation

United States. Information Agency, Voice of America (Organization), and Henry T. Heald. The World of the Engineer. Washington, D.C.: Voice of America, United States Information Agency, 1970.

MLA (8th ed.) Citation

United States. Information Agency, et al. The World of the Engineer. Voice of America, United States Information Agency, 1970.