Pennell, J. (1920). Pen drawing and pen draughtsmen, their work and their methods: A study of the art today with technical suggestions ([1920 ed.].). New York : London: Macmillan Co. ; T. Fisher Unwin.

Pennell, Joseph. Pen Drawing and Pen Draughtsmen, Their Work and Their Methods: A Study of the Art Today With Technical Suggestions. [1920 ed.]. New York : London: Macmillan Co. ; T. Fisher Unwin, 1920.

Pennell, Joseph. Pen Drawing and Pen Draughtsmen, Their Work and Their Methods: A Study of the Art Today With Technical Suggestions. [1920 ed.]. New York : London: Macmillan Co. ; T. Fisher Unwin, 1920.