Yourcenar, M., & Calatayud, E. (1982). Opus nigrum. Alfaguara.
Chicago Style (17th ed.) CitationYourcenar, Marguerite, and Emma Calatayud. Opus Nigrum. Madrid: Alfaguara, 1982.
MLA (9th ed.) CitationYourcenar, Marguerite, and Emma Calatayud. Opus Nigrum. Alfaguara, 1982.
Warning: These citations may not always be 100% accurate.