APA-referens (7:e uppl.)

Hearle, E. F. R., & Mason, R. J. (1963). A data processing system for States and local governments. Prentice-Hall.

Chicago-referens (17:e uppl.)

Hearle, Edward F R., och Raymond J. Mason. A Data Processing System for States and Local Governments. Englewood Cliffs, N. J: Prentice-Hall, 1963.

MLA-referens (9:e uppl.)

Hearle, Edward F R., och Raymond J. Mason. A Data Processing System for States and Local Governments. Prentice-Hall, 1963.