Cosico, V. B. (1977). Morphological studies on the genus Selaginella of the Philippines: I. Leaf epiderman elements, II. Shoot apical meristems, and III. Sporangial development [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Cosico, Victoria Bagaoisan. Morphological Studies on the Genus Selaginella of the Philippines: I. Leaf Epiderman Elements, II. Shoot Apical Meristems, and III. Sporangial Development [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
MLA-referens (9:e uppl.)Cosico, Victoria Bagaoisan. Morphological Studies on the Genus Selaginella of the Philippines: I. Leaf Epiderman Elements, II. Shoot Apical Meristems, and III. Sporangial Development [microform]. Photoduplication Service. University of the Philippines Library, 1977.