APA (7th ed.) Citation

Welmers, B. F., & Welmers, W. E. (1968). Igbo: A learner's dictionary. Univ. of California.

Chicago Style (17th ed.) Citation

Welmers, Beatrice F., and William Everett Welmers. Igbo: A Learner's Dictionary. Los Angeles: Univ. of California, 1968.

MLA (9th ed.) Citation

Welmers, Beatrice F., and William Everett Welmers. Igbo: A Learner's Dictionary. Univ. of California, 1968.