APA (7th ed.) Citation

Hart, M. (1993). Price/Cost Indexes from 1875 to 1989; Estimated to 2010. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hart, Michael. Price/Cost Indexes from 1875 to 1989; Estimated to 2010. Project Gutenberg, 1993.

MLA (9th ed.) Citation

Hart, Michael. Price/Cost Indexes from 1875 to 1989; Estimated to 2010. Project Gutenberg, 1993.

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