United States. Library of Congress. (1990). Library of Congress classification schedules combined with additions and changes through 1989: Class U military science. Gale Research.
Citação norma ChicagoUnited States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1989: Class U Military Science. Detroit: Gale Research, 1990.
Citação norma MLAUnited States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1989: Class U Military Science. Gale Research, 1990.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.