Holbrook, H. L., & McGregor, A. L. (1929). Our world of work. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Holbrook, Harold Lyman, agus A. Laura McGregor. Our World of Work. Boston : New York [etc.]: Allyn and Bacon, 1929.
Lua MLA (8ú heag.)Holbrook, Harold Lyman, agus A. Laura McGregor. Our World of Work. Allyn and Bacon, 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.