ISBN 0-8493-1925-0 K. W. Harde, A Field Guide in Colour to Beetles ISBN 0-7064-1937-5 Pages 7 -- 24 White, R.E. 1983.
ISBN 0-8493-1925-0 K. W. Harde, A Field Guide in Colour to Beetles ISBN 0-7064-1937-5 Pages 7-24 White, R.E. 1983.