APA Style

Royen, P, V., Herrmann-erlee, M, P, M. (1957). Revision of the Sapotaceae of the Malaysian Area in a Wider Sense IX. Pouteria Aublet . Leiden: Blumea.

MLA Style

Royen, P., Van., Herrmann-erlee, M., P., M.. "Revision of the Sapotaceae of the Malaysian Area in a Wider Sense IX. Pouteria Aublet". Leiden: Blumea, 1957. Text.