APA (7e ed.) Bronvermelding

Wilson, L. G., & Gregg, J. R. (1930). Progressive dictation: Arranged according to the units in the Anniversary edition of the Gregg shorthand manual. The Gregg Publishing Co..

Chicago (17e ed.) Bronvermelding

Wilson, Lilliam Grissom, en John Robert Gregg. Progressive Dictation: Arranged According to the Units in the Anniversary Edition of the Gregg Shorthand Manual. New York : Chicago [etc.]: The Gregg Publishing Co., 1930.

MLA (8e ed.) Bronvermelding

Wilson, Lilliam Grissom, en John Robert Gregg. Progressive Dictation: Arranged According to the Units in the Anniversary Edition of the Gregg Shorthand Manual. The Gregg Publishing Co., 1930.