thanks to the Writing Center
When adding a title that is in a foreign languge, follow these basic rules regardless of citation style:
For German, capitalize the first word and all nouns.
For French, capitalize THROUGH the first noun in the title.
For Italian and other languages, capitalize just the first word.
(NOTE: Always capitalize all proper nouns.)
For specific details and examples on citing sources within a paper and on creating a Works Cited page, mouseover the "Citation" tab above and choose the appropriate subpage.
When citing a non-English reference work, use the original title followed by the English translation of the title in brackets.
Kluge, Friedrich. (2002). Etymologisches Wörterbuch der deutschen Sprache [Etymological dictionary of the German language] (24th ed.). Berlin, Germany: de Gruyter.