Gaya APA

Hazlehurst, J. (2009). Tolley's Industrial and Commercial Gas Installation Practice : Gas Service Tecnology Voleme 3 (Fifth Edition). London, New York: London : Routledge,.

Gaya MLA

Hazlehurst, John. "Tolley's Industrial and Commercial Gas Installation Practice : Gas Service Tecnology Voleme 3". Fifth Edition London, New York: London : Routledge,, 2009. Text.