Bromley, R. G. (1965). Studies in the lithology and conditions of the Chalk Rock and comparable horizons. University of London.
Lua i Stíl Chicago (17ú heag.)Bromley, Richard Granville. Studies in the Lithology and Conditions of the Chalk Rock and Comparable Horizons. University of London, 1965.
Lua MLA (8ú heag.)Bromley, Richard Granville. Studies in the Lithology and Conditions of the Chalk Rock and Comparable Horizons. University of London, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.