Cita APA (7th ed.)
Pleasant Books in Easy English Stage 2: A Number of Things. Longman.
Cita Chicago (17th ed.)
Pleasant Books in Easy English Stage 2: A Number of Things. Londres, Inglaterra: Longman.
Cita MLA (9th ed.)
Pleasant Books in Easy English Stage 2: A Number of Things. Longman.
Atenció: Aquestes cites poden no estar 100% correctes.