Roberts, T. D. (1970). Father Gerard Manley Hopkins. Printed for the Hopkins Society].
Lua i Stíl Chicago (17ú heag.)Roberts, Thomas D'Esterre. Father Gerard Manley Hopkins. [London: Printed for the Hopkins Society], 1970.
Lua MLA (8ú heag.)Roberts, Thomas D'Esterre. Father Gerard Manley Hopkins. Printed for the Hopkins Society], 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.