- Dear, Pamela S., ed. (1990). "Walker, Dale L(ee) 1935-". Contemporary Authors: A Bio-Bibliographical Guide to Current Writers in Fiction, General Nonfiction, Poetry, Journalism, Drama, Motion Pictures, Television, and Other Fields. Vol. 49NR. Detroit, Michigan: Gale Research Company. p. xiii. ISBN 0-8103-9340-9. Retrieved April 18, 2019 – via Internet Archive.
- Dear, Pamela S., ed. (1990). "Walker, Dale L(ee) 1935-". Contemporary Authors: A Bio-Bibliographical Guide to Current Writers in Fiction, General Nonfiction, Poetry, Journalism, Drama, Motion Pictures, Television, and Other Fields. Vol. 49NR. Detroit, Michigan: Gale Research Company. p. 50. ISBN 0-8103-9340-9. Retrieved April 18, 2019 – via Internet Archive.
- Dear, Pamela S., ed. (1990). "Walker, Dale L(ee) 1935-". Contemporary Authors: A Bio-Bibliographical Guide to Current Writers in Fiction, General Nonfiction, Poetry, Journalism, Drama, Motion Pictures, Television, and Other Fields. Vol. 49NR. Detroit, Michigan: Gale Research Company. p. 50. ISBN 0-8103-9340-9. Retrieved April 18, 2019 – via Internet Archive.
- Dear, Pamela S., ed. (1990). "Walker, Dale L(ee) 1935-". Contemporary Authors: A Bio-Bibliographical Guide to Current Writers in Fiction, General Nonfiction, Poetry, Journalism, Drama, Motion Pictures, Television, and Other Fields. Vol. 49NR. Detroit, Michigan: Gale Research Company. p. xiii. ISBN 0-8103-9340-9. Retrieved April 18, 2019 – via Internet Archive.