Cita APA (7a ed.)
(1993). How to write and speak better (ed.). The reader's digest association.
Cita Chicago Style (17a ed.)
How to Write and Speak Better. ed. Cape town: The reader's digest association, 1993.
Cita MLA (9a ed.)
How to Write and Speak Better. ed. The reader's digest association, 1993.
Precaución: Estas citas no son 100% exactas.