APA Citation

Funk, W., & Lewis, N. 30 days to a more powerful vocabulary / Wilfred Funk & Norman Lewis. New York ; Pocket Books.

Chicago Style Citation

Funk, Wilfred, and Norman Lewis. 30 Days to a More Powerful Vocabulary / Wilfred Funk & Norman Lewis. New York ; Pocket Books.

MLA Citation

Funk, Wilfred, and Norman Lewis. 30 Days to a More Powerful Vocabulary / Wilfred Funk & Norman Lewis. New York ; Pocket Books.

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