Philippines. Civil Service Commission. (2012). 2012 memorandum circulars. Civil Service Commission.
Chicago-referens (17:e uppl.)Philippines. Civil Service Commission. 2012 Memorandum Circulars. Metro Manila: Civil Service Commission, 2012.
MLA-referens (9:e uppl.)Philippines. Civil Service Commission. 2012 Memorandum Circulars. Civil Service Commission, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.