McDonald, P. M. (1990). Mulches aid in regenerating California and Oregon forests: Past, present and future. USDA Pacific Southwest Forest & Range Experiment Station.
Chicago-Zitierstil (17. Ausg.)McDonald, Philip M. Mulches Aid in Regenerating California and Oregon Forests: Past, Present and Future. Berkeley, Calif: USDA Pacific Southwest Forest & Range Experiment Station, 1990.
MLA-Zitierstil (9. Ausg.)McDonald, Philip M. Mulches Aid in Regenerating California and Oregon Forests: Past, Present and Future. USDA Pacific Southwest Forest & Range Experiment Station, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.