PEARCE II, J. A. (1989). Management John A. Pearce Ii, Richard B. Robinson. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)PEARCE II, John A. Management John A. Pearce Ii, Richard B. Robinson. McGraw-Hill, 1989.
Lua MLA (8ú heag.)PEARCE II, John A. Management John A. Pearce Ii, Richard B. Robinson. McGraw-Hill, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.