Ventriglia, L. (1990). Ready for English: Comprehensive teacher's manual for all four levels. National Textbook.
Citazione stile Chigago Style (17a edizione)Ventriglia, Linda. Ready for English: Comprehensive Teacher's Manual for All Four Levels. Lincolnwood, Ill: National Textbook, 1990.
Citatione MLA (9a ed.)Ventriglia, Linda. Ready for English: Comprehensive Teacher's Manual for All Four Levels. National Textbook, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.