Gruezo, W. S. (1991). Wayside perennial plants of the University of the Philippines at Los Banos. Learning Resource Center and Ethnomorphosystematics Laboratory, Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines at Los Banos.

Gruezo, William SM. Wayside Perennial Plants of the University of the Philippines at Los Banos. Los Banos, Laguna: Learning Resource Center and Ethnomorphosystematics Laboratory, Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines at Los Banos, 1991.

Gruezo, William SM. Wayside Perennial Plants of the University of the Philippines at Los Banos. Learning Resource Center and Ethnomorphosystematics Laboratory, Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines at Los Banos, 1991.