World Health Organization. (2004). Concise International chemical Assessment Document; As Phalt (Bitumen). IOMS.
Chicago-referens (17:e uppl.)World Health Organization. Concise International Chemical Assessment Document; As Phalt (Bitumen). Ginebra: IOMS, 2004.
MLA-referens (9:e uppl.)World Health Organization. Concise International Chemical Assessment Document; As Phalt (Bitumen). IOMS, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.