APA (7th ed.) Citation

Omar Khayyam, FitzGerald, E., & Lang Andrew. (1920). Rubáiyát of Omar Khayyám. R.F. Fenno.

Chicago Style (17th ed.) Citation

Omar Khayyam, Edward FitzGerald, and Lang Andrew. Rubáiyát of Omar Khayyám. New York: R.F. Fenno, 1920.

MLA (9th ed.) Citation

Omar Khayyam, et al. Rubáiyát of Omar Khayyám. R.F. Fenno, 1920.