(1927). Cohesion and related problems.
Lua i Stíl Chicago (17ú heag.)Cohesion and Related Problems. 1927.
Lua MLA (9ú heag.)Cohesion and Related Problems. 1927.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)