From The Doctor Who File by Peter Haining
From Doctor Who: 25 Glorious Years by Peter Haining (artist unknown)
Book and Video Covers
Chris Achilleos' cover art for The Daleks ...
Alister Pearson's cover for the video release of An Unearthly Child...
...his cover for the Planet of Giants book:
...and his cover for The Dalek Masterplan:
The Edge of Destruction by Pearson (I think):
Tony Masero's book cover for The Romans:
Unattributed: