Cita APA

Viardot, P. 1., & Viardot, P. 1. (1889). An hour of study: Exercises for the voice. United States of America: G. Schirmer.

Citación estilo Chicago

Viardot, Pauline 1821-1910, y Pauline 1821-1910 Viardot. An Hour of Study: Exercises for the Voice. United States of America: G. Schirmer, 1889.

Cita MLA

Viardot, Pauline 1821-1910, y Pauline 1821-1910 Viardot. An Hour of Study: Exercises for the Voice. United States of America: G. Schirmer, 1889.