Cita APA (7th ed.)

Krall, E. (1913). The Art of tone production on the violoncello (1a. ed.). Charles Scribner's Sons.

Cita Chicago (17th ed.)

Krall, Emil. The Art of Tone Production on the Violoncello. 1a. ed. Londres: Charles Scribner's Sons, 1913.

Cita MLA (9th ed.)

Krall, Emil. The Art of Tone Production on the Violoncello. 1a. ed. Charles Scribner's Sons, 1913.