CROSBY PHILIP B. (1980). QUALITY IS FREE THE ART OF MAKING QUALITY CERTAIN. MENTOR BOOKS.
Citazione stile Chigago Style (17a edizione)CROSBY PHILIP B. QUALITY IS FREE THE ART OF MAKING QUALITY CERTAIN. NEW YORK: MENTOR BOOKS, 1980.
Citatione MLA (9a ed.)CROSBY PHILIP B. QUALITY IS FREE THE ART OF MAKING QUALITY CERTAIN. MENTOR BOOKS, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.