APA (7th ed.) Citation

Hummel, F. C., Palz, W., & Grassi, G. (1988). Biomass forestry in Europe: A strategy for the future. Elsevier Applied Science.

Chicago Style (17th ed.) Citation

Hummel, F. C., W. Palz, and G. Grassi. Biomass Forestry in Europe: A Strategy for the Future. London ; New York: Elsevier Applied Science, 1988.

MLA (9th ed.) Citation

Hummel, F. C., et al. Biomass Forestry in Europe: A Strategy for the Future. Elsevier Applied Science, 1988.