Hammond, Sandra Noll (1984). "Clues to Ballet's Technical History from the Early Nineteenth-Century Ballet Lesson". Dance Research. III (1). Edinburgh University Press: 53–66. doi:10.2307/1290587. ISSN0264-2875. JSTOR1290587.
Hammond, Sandra Noll (1984). "Clues to Ballet's Technical History from the Early Nineteenth-Century Ballet Lesson". Dance Research. III (1). Edinburgh University Press: 53–66. doi:10.2307/1290587. ISSN0264-2875. JSTOR1290587.
Hammond, Sandra Noll (1984). "Clues to Ballet's Technical History from the Early Nineteenth-Century Ballet Lesson". Dance Research. III (1). Edinburgh University Press: 53–66. doi:10.2307/1290587. ISSN0264-2875. JSTOR1290587.