APA Style

PAMPLONA, P, P. (1980). Ecotypic variations in Rottboellia exaltata L.F. and its economics of control in corn . : University of the Philippines.

MLA Style

PAMPLONA, Pablito, P.. "Ecotypic variations in Rottboellia exaltata L.F. and its economics of control in corn". : University of the Philippines, 1980. Electronic resources.