APA

PARKER s., . (2004). SCIENCE FILES : CHEMICALS & CHANGE. : heinemann library.

Chicago

PARKER steve, . 2004. SCIENCE FILES : CHEMICALS & CHANGE. : heinemann library.

Harvard

PARKER s., . (2004). SCIENCE FILES : CHEMICALS & CHANGE. : heinemann library.

MLA

PARKER steve, . SCIENCE FILES : CHEMICALS & CHANGE. : heinemann library. 2004.