Louis Fidge; Sarah Lindsey. (2013). Vocabulary: Pupil Book 1 (Collins Primary Focus) (New edition.). Collins UK.
Citazione stile Chigago Style (17a edizione)Louis Fidge; Sarah Lindsey. Vocabulary: Pupil Book 1 (Collins Primary Focus). New edition. Collins UK, 2013.
Citatione MLA (9a ed.)Louis Fidge; Sarah Lindsey. Vocabulary: Pupil Book 1 (Collins Primary Focus). New edition. Collins UK, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.