Cita APA (7th ed.)
Blake, L. W., & Cutler, H. C. (2001). Plants from the past. University of Alabama Press.
Cita Chicago (17th ed.)
Blake, Leonard W., i Hugh C. Cutler. Plants from the Past. Tuscaloosa: University of Alabama Press, 2001.
Cita MLA (9th ed.)
Blake, Leonard W., i Hugh C. Cutler. Plants from the Past. University of Alabama Press, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.