Simmons, I. (1991). Earth, air and water: Resources and environment in the late 20th century. Edward Arnold.
Citação do estilo Chicago (17ª ed.)Simmons, I.G. Earth, Air and Water: Resources and Environment in the Late 20th Century. London: Edward Arnold, 1991.
Citação MLA (9ª ed.)Simmons, I.G. Earth, Air and Water: Resources and Environment in the Late 20th Century. Edward Arnold, 1991.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.