APA Style

Bradley, Ray. (1999). Understanding Computer Science for Advanced Level (4th edition). UK: Nelson Thornes Limited.

Chicago Style

Bradley, Ray. Understanding Computer Science for Advanced Level. 4th edition UK: Nelson Thornes Limited, 1999. Text.

MLA Style

Bradley, Ray. Understanding Computer Science for Advanced Level. 4th edition UK: Nelson Thornes Limited, 1999. Text.

Turabian Style

Bradley, Ray. Understanding Computer Science for Advanced Level. 4th edition UK: Nelson Thornes Limited, 1999. Print.