Gaya APA
Date, C. (1986).
An Introduction To Database Systems (Ed.4 Voi.1).
Canada:
Addison-Wesley Pubishing Company, Inc.
Gaya MLA
Date, C.J.
"An Introduction To Database Systems".
Ed.4 Voi.1
Canada:
Addison-Wesley Pubishing Company, Inc,
1986.
Text.