Brown, G. E., & Kirkham, T. (2004). The pruning of trees, shrubs, and conifers (2nd ed.). Timber Press.
Cita Chicago Style (17a ed.)Brown, George E., y Tony Kirkham. The Pruning of Trees, Shrubs, and Conifers. 2nd ed. Portland, Or: Timber Press, 2004.
Cita MLA (8a ed.)Brown, George E., y Tony Kirkham. The Pruning of Trees, Shrubs, and Conifers. 2nd ed. Timber Press, 2004.
Precaución: Estas citas no son 100% exactas.