Hakkila, P. (1989). Utilization of residual forest biomass. Springer-Verlag.
芝加哥风格引文Hakkila, P. Utilization of Residual Forest Biomass. Berlin: Springer-Verlag, 1989.
MLA引文Hakkila, P. Utilization of Residual Forest Biomass. Springer-Verlag, 1989.
警告：这些引文格式不一定是100％准确.