Cita APA (7a ed.)
Barker, R. (1990). CASE. Method. Entity relationship modelling. Addison-Wesley.
Cita Chicago Style (17a ed.)
Barker, Richard. CASE. Method. Entity Relationship Modelling. Wokingham: Addison-Wesley, 1990.
Cita MLA (9a ed.)
Barker, Richard. CASE. Method. Entity Relationship Modelling. Addison-Wesley, 1990.
Precaución: Estas citas no son 100% exactas.