Cowan, A. (1966). A backward glance. Hutchinson.
Lua i Stíl Chicago (17ú heag.)Cowan, Alan. A Backward Glance. London: Hutchinson, 1966.
Lua MLA (8ú heag.)Cowan, Alan. A Backward Glance. Hutchinson, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.