Gaya APA
Sidiyasa, K. et al (1998).
Taxonomy ,Phylogeny, and wood anatomy of Alstonia (Apocynaceae ) .
Netherlands:
Rijksherbarium/Hortus Botanius.
Gaya MLA
Sidiyasa, Kade. et al.
"Taxonomy ,Phylogeny, and wood anatomy of Alstonia (Apocynaceae )".
Netherlands:
Rijksherbarium/Hortus Botanius,
1998.
Text.