APA (7th ed.) Citation

MacKinnon, J. B. (2013). The once and future world: Nature as it was, as it is, as it could be. Houghton Mifflin Harcourt.

Chicago Style (17th ed.) Citation

MacKinnon, J. B. The Once and Future World: Nature as It Was, as It Is, as It Could Be. Boston: Houghton Mifflin Harcourt, 2013.

MLA (9th ed.) Citation

MacKinnon, J. B. The Once and Future World: Nature as It Was, as It Is, as It Could Be. Houghton Mifflin Harcourt, 2013.