Dyfyniad APA
Johnson, P. S., Shifley, S. R., & Rogers, R. (2002). The ecology and silviculture of oaks. CABI.
Dyfyniad Arddull Chicago
Johnson, Paul S., Stephen R. Shifley, and Robert Rogers. The Ecology and Silviculture of Oaks. Wallingford, Oxon ; New York: CABI, 2002.
Dyfyniad MLA
Johnson, Paul S., et al. The Ecology and Silviculture of Oaks. CABI, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.