Complex sentence: It is among the most abundant species of emergent trees in these forests, Ashton, P.S. Dipterocarpaceae, in "Tree Flora of Sabah and Sarawak," Volume 5,2004.
Split into simpler sentences: It is among the most abundant species of emeregent trees in these forest Ashton, P.S. Dipterocarpaceae. In "Tree Flora of Sabah and Sarawak," Volume 5,2004.