Warren, G. W. (1996). The art of teaching ballet: Ten twentieth-century masters. University Press of Florida.
Lua i Stíl Chicago (17ú heag.)Warren, Gretchen Ward. The Art of Teaching Ballet: Ten Twentieth-century Masters. Gainesville: University Press of Florida, 1996.
Lua MLA (9ú heag.)Warren, Gretchen Ward. The Art of Teaching Ballet: Ten Twentieth-century Masters. University Press of Florida, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.