Ausubel, K. (1997). Restoring the earth: Visionary solutions from the bioneers. H J Kramer.
Cita Chicago (17th ed.)Ausubel, Ken. Restoring the Earth: Visionary Solutions from the Bioneers. Tiburon, Calif: H J Kramer, 1997.
Cita MLA (9th ed.)Ausubel, Ken. Restoring the Earth: Visionary Solutions from the Bioneers. H J Kramer, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.