Cita APA (7th ed.)

International Programme on Chemical Safety. (2004). Asphalt (Bitumen). World Health Organization.

Cita Chicago (17th ed.)

International Programme on Chemical Safety. Asphalt (Bitumen). Geneva: World Health Organization, 2004.

Cita MLA (9th ed.)

International Programme on Chemical Safety. Asphalt (Bitumen). World Health Organization, 2004.