Gaya APA

ALLAN, M. (1986). Concepts In Chemistry (Seri: Background To Technology BOOK 9) (1st ed). London: City & Guilds of London Institute.

Gaya MLA

ALLAN, M.. "Concepts In Chemistry (Seri: Background To Technology BOOK 9)". 1st ed London: City & Guilds of London Institute, 1986. Printed.