Cardwell, D., & Krauss, C. Natural gas is attractive to truckers. IN Sustainability. Manila Bulletin.
Chicago-referens (17:e uppl.)Cardwell, Diane, och Clifford Krauss. "Natural Gas Is Attractive to Truckers. IN Sustainability." Manila Bulletin .
MLA-referens (9:e uppl.)Cardwell, Diane, och Clifford Krauss. "Natural Gas Is Attractive to Truckers. IN Sustainability." Manila Bulletin, .
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.