APA

Richards J., Barr B., Cox T., Dargavel J., Feeny D., Goucher C., Laarman J., McNeill J., Peter A., Thomson J., Tucker R. & Williams M. (1989). World deforestation in the twentieth century. Durham: Duke University Press.

Chicago

Richards John, Barr Brenton, Cox Thomas, Dargavel John, Feeny David, Goucher Candice, Laarman Jan, McNeill John, Peter Alfonso, Thomson James, Tucker Richard and Williams Michael. 1989. World deforestation in the twentieth century. Durham: Duke University Press.

Harvard

Richards J., Barr B., Cox T., Dargavel J., Feeny D., Goucher C., Laarman J., McNeill J., Peter A., Thomson J., Tucker R. and Williams M. (1989). World deforestation in the twentieth century. Durham: Duke University Press.

MLA

Richards John, Barr Brenton, Cox Thomas, Dargavel John, Feeny David, Goucher Candice, Laarman Jan, McNeill John, Peter Alfonso, Thomson James, Tucker Richard and Williams Michael. World deforestation in the twentieth century. Durham: Duke University Press. 1989.