SHEA MICHAEL. (1988). INFLUENCE: HOW TO MAKE THE SYSTEM WORK FOR YOU. SPHERE BOOKS LTD.
Citazione stile Chigago Style (17a edizione)SHEA MICHAEL. INFLUENCE: HOW TO MAKE THE SYSTEM WORK FOR YOU. LONDON: SPHERE BOOKS LTD, 1988.
Citatione MLA (9a ed.)SHEA MICHAEL. INFLUENCE: HOW TO MAKE THE SYSTEM WORK FOR YOU. SPHERE BOOKS LTD, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.