Gaya APA
Ashton, P. (1968).
A manual of the dipterocarp trees of Brunai State and Of Sarawak .
Kuching Sarawak ,Mlaysia:
Cathay Press.
Gaya MLA
Ashton, P..s..
"A manual of the dipterocarp trees of Brunai State and Of Sarawak".
Kuching Sarawak ,Mlaysia:
Cathay Press,
1968.
Text.