APA (7th ed.) Citation

Hasek, C. W., Leffler, G. L., & Waters, R. H. (1942). Industrial trends in Pennsylvania since 1914. The Pennsylvania State College.

Chicago Style (17th ed.) Citation

Hasek, Carl William, George Leland Leffler, and Richard Hadly Waters. Industrial Trends in Pennsylvania Since 1914. State College, Pa.: The Pennsylvania State College, 1942.

MLA (9th ed.) Citation

Hasek, Carl William, et al. Industrial Trends in Pennsylvania Since 1914. The Pennsylvania State College, 1942.