Shields, J. M. (1987). An analysis of selected aspects of leadership skills among selected principals of Catholic secondary schools in the Archdiocese of Chicago.
Lua i Stíl Chicago (17ú heag.)Shields, John Michael. An Analysis of Selected Aspects of Leadership Skills Among Selected Principals of Catholic Secondary Schools in the Archdiocese of Chicago. 1987.
Lua MLA (8ú heag.)Shields, John Michael. An Analysis of Selected Aspects of Leadership Skills Among Selected Principals of Catholic Secondary Schools in the Archdiocese of Chicago. 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.