Gaya APA
Newman, M. et al (1998).
Sumatera Medium and Heavy Hardwoods : Dipterocarpus, Dryobalanops, Hopea, Shorea (balau ) .
Bogor:
Cifor.
Gaya MLA
Newman, M.F. et al.
"Sumatera Medium and Heavy Hardwoods : Dipterocarpus, Dryobalanops, Hopea, Shorea (balau )".
Bogor:
Cifor,
1998.
Text.