Cita APA (7a ed.)
(1998). State of the world 1998: <a> Worldwatch Instite report on progress toward a sustainable society. W.W. Norton & Company.
Cita Chicago Style (17a ed.)
State of the World 1998: <a> Worldwatch Instite Report on Progress Toward a Sustainable Society. New York: W.W. Norton & Company, 1998.
Cita MLA (9a ed.)
State of the World 1998: <a> Worldwatch Instite Report on Progress Toward a Sustainable Society. W.W. Norton & Company, 1998.
Precaución: Estas citas no son 100% exactas.