Kellogg, R. T. (1999). The psychology of writing. Oxford University.
Chicago Style (17th ed.) ZitazioaKellogg, Ronald T. The Psychology of Writing. Nueva York: Oxford University, 1999.
MLA (9th ed.) ZitazioaKellogg, Ronald T. The Psychology of Writing. Oxford University, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.