APA-Zitierstil (7. Ausg.)

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

Chicago-Zitierstil (17. Ausg.)

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

MLA-Zitierstil (9. Ausg.)

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