SINGLETON, W. (1972). Introduction To Ergonomics / W.t. Singleton. WORLD hEALTH ORGANIZATION.
Lua i Stíl Chicago (17ú heag.)SINGLETON, W.T. Introduction To Ergonomics / W.t. Singleton. WORLD hEALTH ORGANIZATION, 1972.
Lua MLA (8ú heag.)SINGLETON, W.T. Introduction To Ergonomics / W.t. Singleton. WORLD hEALTH ORGANIZATION, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.