(1993). How to write and speak better. Reader's Digest Association.
Citazione stile Chigago Style (17a edizione)How to Write and Speak Better. London: Reader's Digest Association, 1993.
Citatione MLA (9a ed.)How to Write and Speak Better. Reader's Digest Association, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.