West Virginia Pulp and Paper Company. Industrial Chemical Sales Division. (1937). The modern purifier. Industrial chemical sales division, West Virginia pulp & paper company.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিWest Virginia Pulp and Paper Company. Industrial Chemical Sales Division. The Modern Purifier. New York, Chicago: Industrial chemical sales division, West Virginia pulp & paper company, 1937.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিWest Virginia Pulp and Paper Company. Industrial Chemical Sales Division. The Modern Purifier. Industrial chemical sales division, West Virginia pulp & paper company, 1937.
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