Senge, P. M. (1994). The Fifth Discipline Fieldbook. Nicholas Brealey Publication.
Lua i Stíl Chicago (17ú heag.)Senge, Peter M. The Fifth Discipline Fieldbook. Nicholas Brealey Publication, 1994.
Lua MLA (9ú heag.)Senge, Peter M. The Fifth Discipline Fieldbook. Nicholas Brealey Publication, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.