APA (7th ed.) Citation

Sim, D., & Hilmi, H. A. (1987). Forestry extension methods. FAO.

Chicago Style (17th ed.) Citation

Sim, D., and H. A. Hilmi. Forestry Extension Methods. Rome: FAO, 1987.

MLA (9th ed.) Citation

Sim, D., and H. A. Hilmi. Forestry Extension Methods. FAO, 1987.