Cita APA (7a ed.)

SoRelle, R. P., & Smith, H. H. (1936). Advanced typewriting exercises. Gregg Publishing Co..

Cita Chicago Style (17a ed.)

SoRelle, Rupert Pitt, y Harold Harland Smith. Advanced Typewriting Exercises. New York : Chicago [etc.]: Gregg Publishing Co., 1936.

Cita MLA (8a ed.)

SoRelle, Rupert Pitt, y Harold Harland Smith. Advanced Typewriting Exercises. Gregg Publishing Co., 1936.