World Health Organization. (2004). Concise International chemical Assessment Document; As Phalt (Bitumen). IOMS.
Citazione stile Chigago Style (17a edizione)World Health Organization. Concise International Chemical Assessment Document; As Phalt (Bitumen). Ginebra: IOMS, 2004.
Citatione MLA (9a ed.)World Health Organization. Concise International Chemical Assessment Document; As Phalt (Bitumen). IOMS, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.