Lucas, G. Star wars, 1996 p. 8 (a dark Lord of the Sith) p. 40 (Lord Darth Vader; Lord Vader)
Glut, D.F. The Empire strikes back, 1996 p. v (Darth Vader, Luke Skywalker's father)
Kahn, J. Return of the Jedi, 1996 p. vii (Darth Vader)
Wright, G. Science fiction image, c1983 (Darth Vader)
Pringle, D. Imaginary people, 1988 (Vader, Darth; heavy breathing, black-clad villian of space-opera films Star wars, etc.; a Jedi knight named Annakin Skywalker, father of the young hero)
Encyc. of science fiction, 1979 p. 570 under art. for Star wars (1977 film; Darth Vader, masked black-clad giant; a cross between Dr. Doom and a Samurai warrior)
AltaVista search, July 8, 1999 (numerous hits on both "Annakin Skywalker" and "Anakin Skywalker")