APA (7th ed.) Citation

Opdahl, R. D. (1967). Pattern and purpose: A handbook of grammar, usage, and style. Dickenson Pub. Co.

Chicago Style (17th ed.) Citation

Opdahl, Richard D. Pattern and Purpose: A Handbook of Grammar, Usage, and Style. Belmont, Calif: Dickenson Pub. Co, 1967.

MLA (9th ed.) Citation

Opdahl, Richard D. Pattern and Purpose: A Handbook of Grammar, Usage, and Style. Dickenson Pub. Co, 1967.