John Jackman; Wendy Wren. (2013). Writing: Teacher's Guide 1 (Collins Primary Focus) (New edition.). HarperCollins UK.
Citazione stile Chigago Style (17a edizione)John Jackman; Wendy Wren. Writing: Teacher's Guide 1 (Collins Primary Focus). New edition. HarperCollins UK, 2013.
Citatione MLA (9a ed.)John Jackman; Wendy Wren. Writing: Teacher's Guide 1 (Collins Primary Focus). New edition. HarperCollins UK, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.