Philippines (Republic). The National Library, De Guzman, A. C. c., & Villarino, U. G. j. c. (1973). Bibliography of materials in Philippine vernacular languages. [s.n.].
Chicago-referens (17:e uppl.)Philippines (Republic). The National Library, Abraham C. comp De Guzman, och Ursula G. joint comp Villarino. Bibliography of Materials in Philippine Vernacular Languages. Manila: [s.n.], 1973.
MLA-referens (9:e uppl.)Philippines (Republic). The National Library, et al. Bibliography of Materials in Philippine Vernacular Languages. [s.n.], 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.