Booher, D. D. (1991). Executive's portfolio of model speeches for all occasions. Prentice Hall.
Citazione stile Chigago Style (17a edizione)Booher, Dianna Daniels. Executive's Portfolio of Model Speeches for All Occasions. Englewood Cliffs, N.J: Prentice Hall, 1991.
Citatione MLA (9a ed.)Booher, Dianna Daniels. Executive's Portfolio of Model Speeches for All Occasions. Prentice Hall, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.