PLOVNICK MARK J. (1982). ORGANIZATION DEVELOPPMENT EXERCISES,CASES AND READINGS. LITTLE BROWN AND COMPANY.
Lua i Stíl Chicago (17ú heag.)PLOVNICK MARK J. ORGANIZATION DEVELOPPMENT EXERCISES,CASES AND READINGS. TORONTO: LITTLE BROWN AND COMPANY, 1982.
Lua MLA (9ú heag.)PLOVNICK MARK J. ORGANIZATION DEVELOPPMENT EXERCISES,CASES AND READINGS. LITTLE BROWN AND COMPANY, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.