Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.