GILL R. W, . (1999). "RENDERING WITH PEN AND INK, WITH 192 ILLUSTRATION, THE THAMES AND HUDSON MANUAL.". NULL: NULL.
GILL R. W, . 1999. "RENDERING WITH PEN AND INK, WITH 192 ILLUSTRATION, THE THAMES AND HUDSON MANUAL.". NULL: NULL.
GILL R. W, . "RENDERING WITH PEN AND INK, WITH 192 ILLUSTRATION, THE THAMES AND HUDSON MANUAL.". NULL: NULL. 1999.