APA Style
Royen, P, V. (1960).
Revision of the Sapotaceae of the Malaysian Area in a Wider Sense V. Haplolobus .
Leiden:
Blumea.
MLA Style
Royen, P., Van.
"Revision of the Sapotaceae of the Malaysian Area in a Wider Sense V. Haplolobus".
Leiden:
Blumea,
1960.
Text.