Environmental Sanitation Information Center (Bangkok, Thailand). Environmental sanitation abstracts. Environmental Sanitation Information Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEnvironmental Sanitation Information Center (Bangkok, Thailand). Environmental Sanitation Abstracts. Bangkok, Thailand: Environmental Sanitation Information Center.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEnvironmental Sanitation Information Center (Bangkok, Thailand). Environmental Sanitation Abstracts. Environmental Sanitation Information Center.
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