Holtby, R. T. (1972). Carlisle Cathedral. [Pitkin Pictorials].
Chicago Style aipamenaHoltby, Robert T. Carlisle Cathedral. [London]: [Pitkin Pictorials], 1972.
MLA aipamenaHoltby, Robert T. Carlisle Cathedral. [Pitkin Pictorials], 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.