Cita APA (7th ed.)

Perry, W. E. (1980). Control in a data base environment. Q.E.D. Information Sciences.

Cita Chicago (17th ed.)

Perry, William E. Control in a Data Base Environment. Wellesley, Mass: Q.E.D. Information Sciences, 1980.

Cita MLA (9th ed.)

Perry, William E. Control in a Data Base Environment. Q.E.D. Information Sciences, 1980.