Cita APA (7a ed.)

Date, C. J. (1981). An introduction to database systems. Addison-Wesley.

Cita Chicago Style (17a ed.)

Date, C. J. An Introduction to Database Systems. Reading, Massachusetts [etc.]: Addison-Wesley, 1981.

Cita MLA (9a ed.)

Date, C. J. An Introduction to Database Systems. Addison-Wesley, 1981.