References
^ Williams, Melanie; Nixon, Caroline; Tomlinson, Michael (2014). Kid's Box for Spanish Speakers Level 1 Teacher's Book, Cambridge Univ Pr. BiggerBooks. ISBN 9788483235874 (revised Feb 2024)^ (2013). Kid's Box for Spanish Speakers Level 1 Teacher's Book ECampus. ISBN 9788483235874 (revised May 2015)
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