Philippines (Commonwealth). Office of Adult Education, Philippines (Republic). Bureau of Public Schools, & Division of Adult Education. (1938). Philippine adult education series. Project no. 1- ([Bikol language edition].). Bureau of Print.
Chicago-referens (17:e uppl.)Philippines (Commonwealth). Office of Adult Education, Philippines (Republic). Bureau of Public Schools, och Division of Adult Education. Philippine Adult Education Series. Project No. 1-. [Bikol language edition]. Manila: Bureau of Print, 1938.
MLA-referens (9:e uppl.)Philippines (Commonwealth). Office of Adult Education, et al. Philippine Adult Education Series. Project No. 1-. [Bikol language edition]. Bureau of Print, 1938.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.