Case, D., Davey, J., & Milne, J. (1982). Developing writing skills in english: Workbook. Heinemann Educational Books.
Citazione stile Chigago Style (17a edizione)Case, Dough, John Davey, e John Milne. Developing Writing Skills in English: Workbook. Londres: Heinemann Educational Books, 1982.
Citatione MLA (9a ed.)Case, Dough, et al. Developing Writing Skills in English: Workbook. Heinemann Educational Books, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.