Lauchachinda, C. (1977). Congruence of circles associated with a given surface [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Lauchachinda, Chintana. Congruence of Circles Associated with a Given Surface [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
MLA-referens (9:e uppl.)Lauchachinda, Chintana. Congruence of Circles Associated with a Given Surface [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.