Ragaei, E. M. (1983). Heavy versus light oil: Technical issues and economic considerations. The International Research Center for Energy and Economic Development.
Citação do estilo Chicago (17ª ed.)Ragaei, El Mallakh. Heavy Versus Light Oil: Technical Issues and Economic Considerations. Colorado: The International Research Center for Energy and Economic Development, 1983.
Citação MLA (9ª ed.)Ragaei, El Mallakh. Heavy Versus Light Oil: Technical Issues and Economic Considerations. The International Research Center for Energy and Economic Development, 1983.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.