Cita APA (7a ed.)
(1974). Quarterly bulletin of coal statistics for Europe. United Nations.
Cita Chicago Style (17a ed.)
Quarterly Bulletin of Coal Statistics for Europe. New York: United Nations, 1974.
Cita MLA (9a ed.)
Quarterly Bulletin of Coal Statistics for Europe. United Nations, 1974.
Precaución: Estas citas no son 100% exactas.