APA (7th ed.) Citation

(1977). Building English skills: Blue level. Skills practice book. McDougal, Littell & Company.

Chicago Style (17th ed.) Citation

Building English Skills: Blue Level. Skills Practice Book. Evanston, Illinois, USA: McDougal, Littell & Company, 1977.

MLA (9th ed.) Citation

Building English Skills: Blue Level. Skills Practice Book. McDougal, Littell & Company, 1977.