Hawley, C. (2002). Hazardous materials air monitoring and detection devices. Australia: Delmar Cengage Learning.
शिकागो स्टाइल उद्धरणHawley, Chris. Hazardous Materials Air Monitoring and Detection Devices. Australia: Delmar Cengage Learning, 2002.
एमएलए उद्धरणHawley, Chris. Hazardous Materials Air Monitoring and Detection Devices. Australia: Delmar Cengage Learning, 2002.
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