The ring of the Niblung :
a trilogy with a prelude ; translated into English by Margaret Armour.
APA Citation
Wagner, R., Armour, M., Rackham, A. (1939). The ring of the Niblung: a trilogy with a prelude ; translated into English by Margaret Armour. New York: Garden City.
MLA Citation
Wagner, Richard, 1813-1883, Margaret Armour, and Arthur Rackham. The Ring of the Niblung: a Trilogy With a Prelude ; Translated Into English by Margaret Armour. New York: Garden City, 1939.
Warning: These citations may not always be complete (especially for serials).