APA (7th ed.) Citation

Dallas & Linda Pelham. (2005). New Let's learn English 1. Pearson.

Chicago Style (17th ed.) Citation

Dallas and Linda Pelham. New Let's Learn English 1. United Kingdom: Pearson, 2005.

MLA (9th ed.) Citation

Dallas and Linda Pelham. New Let's Learn English 1. Pearson, 2005.