APA Format
World Health Organization (WHO) . (). N-methyl-2-pyrrolidone: concise international chemical assessment document No.35, international programme on chemical safety. : Geneva WHO 2001
MLA Format
World Health Organization (WHO) . N-methyl-2-pyrrolidone: concise international chemical assessment document No.35, international programme on chemical safety. : Geneva WHO 2001,
Australian/Harvard Format
World Health Organization (WHO) . . N-methyl-2-pyrrolidone: concise international chemical assessment document No.35, international programme on chemical safety. Geneva WHO 2001, 
Warning: These citations may not always be 100% accurate.