The Publication Manual of the American Psychological Association provides detailed guidelines for using APA style.
American Psychological Association. (2020). Publication manual of the American Psychological Association. (7th ed.). Washington, DC: American Psychological Association.
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 "APA Style" tab above and choose the appropriate subpage.