Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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