Wetherell, V. (1948). The invisible river. Unie-Volkspers.
Lua i Stíl Chicago (17ú heag.)Wetherell, Violet. The Invisible River. Cape Town: Unie-Volkspers, 1948.
Lua MLA (8ú heag.)Wetherell, Violet. The Invisible River. Unie-Volkspers, 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.