Oglesby, C. (1989). Productivity Improvement In Construction Clarkson H. Oglesby, Henry W. Parker, Gregory A. Howell. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Oglesby, Clarkson. Productivity Improvement In Construction Clarkson H. Oglesby, Henry W. Parker, Gregory A. Howell. McGraw-Hill, 1989.
Lua MLA (8ú heag.)Oglesby, Clarkson. Productivity Improvement In Construction Clarkson H. Oglesby, Henry W. Parker, Gregory A. Howell. McGraw-Hill, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.