APA (7th ed.) Citation

The writing improvement project. (1977). Building english skills: Blue level. McDougal, Litell & Company.

Chicago Style (17th ed.) Citation

The writing improvement project. Building English Skills: Blue Level. Illinois: McDougal, Litell & Company, 1977.

MLA (8th ed.) Citation

The writing improvement project. Building English Skills: Blue Level. McDougal, Litell & Company, 1977.

Warning: These citations may not always be 100% accurate.