William Strahan (Firm), Strahan Archive (British Library), British Library, & British Library. (1989). The Strahan archive from the British Library, London. Research Publications.
Lua i Stíl Chicago (17ú heag.)William Strahan (Firm), Strahan Archive (British Library), British Library, agus British Library. The Strahan Archive from the British Library, London. Reading, England ; Woodbridge, Conn.: Research Publications, 1989.
Lua MLA (8ú heag.)William Strahan (Firm), et al. The Strahan Archive from the British Library, London. Research Publications, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.