Louis Fidge; Sarah Lindsey; Stephanie Austwick. (2013). Vocabulary: Teacher's Guide 1 (Collins Primary Focus) (New edition.). HarperCollins UK.
Chicago-viite (17. p.)Louis Fidge; Sarah Lindsey; Stephanie Austwick. Vocabulary: Teacher's Guide 1 (Collins Primary Focus). New edition. HarperCollins UK, 2013.
MLA-viite (9. p.)Louis Fidge; Sarah Lindsey; Stephanie Austwick. Vocabulary: Teacher's Guide 1 (Collins Primary Focus). New edition. HarperCollins UK, 2013.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.