Crystal, D., & Davy, D. (1969). Investigating English style. Longmans.
Chicago Edition CitationCrystal, David, i Derek Davy. Investigating English Style. Harlow: Longmans, 1969.
Cita MLACrystal, David, i Derek Davy. Investigating English Style. Longmans, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.