APA Edition Citation

Funk, W. J., & Lewis, N. (1945). 30 days to a more powerful vocabulary. Funk, inc..

Chicago Edition Citation

Funk, Wilfred J., and Norman Lewis. 30 Days to a More Powerful Vocabulary. N.Y.: Funk, inc., 1945.

MLA Edition Citation

Funk, Wilfred J., and Norman Lewis. 30 Days to a More Powerful Vocabulary. Funk, inc., 1945.