Citazione Stile APA (7a Edizione)

Funk, W. J., & Lewis, N. (1970). 30 days to a more powerful vocabulary (Newly rev. by Norman Lewis.). Pocket Books.

Citazione stile Chigago Style (17a edizione)

Funk, Wilfred John, e Norman Lewis. 30 Days to a More Powerful Vocabulary. Newly rev. by Norman Lewis. New York: Pocket Books, 1970.

Citatione MLA (9a ed.)

Funk, Wilfred John, e Norman Lewis. 30 Days to a More Powerful Vocabulary. Newly rev. by Norman Lewis. Pocket Books, 1970.