Cita APA (7a ed.)

Hudson, M. (1984). DP index & software (8th ed.). Peter Isaacson.

Cita Chicago Style (17a ed.)

Hudson, Malcolm. DP Index & Software. 8th ed. Prahran, Victoria: Peter Isaacson, 1984.

Cita MLA (9a ed.)

Hudson, Malcolm. DP Index & Software. 8th ed. Peter Isaacson, 1984.