Cita APA (7a ed.)

Ward, J. R. (1982). An Introduction to the DB Relational Database Management System. International Institute for Applied Systems Analysis.

Cita Chicago Style (17a ed.)

Ward, John Robert. An Introduction to the DB Relational Database Management System. Laxenburg: International Institute for Applied Systems Analysis, 1982.

Cita MLA (9a ed.)

Ward, John Robert. An Introduction to the DB Relational Database Management System. International Institute for Applied Systems Analysis, 1982.