Richardson, P. (1998). Style: A pragmatic approach. Allyn and Bacon.
Chicago Style aipamenaRichardson, Peter. Style: A Pragmatic Approach. Boston: Allyn and Bacon, 1998.
MLA aipamenaRichardson, Peter. Style: A Pragmatic Approach. Allyn and Bacon, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.