APA
Philip Kay, . (2002). Step by Step Non-Verbal Reasoning. : Hodder & Stoughton.
Chicago
Philip Kay, . 2002. Step by Step Non-Verbal Reasoning. : Hodder & Stoughton.
Harvard
Philip Kay, . (2002). Step by Step Non-Verbal Reasoning. : Hodder & Stoughton.
MLA
Philip Kay, . Step by Step Non-Verbal Reasoning. : Hodder & Stoughton. 2002.