Cita APA (7a ed.)

Marcos, I. R. Social services improvement. s.n.

Cita Chicago Style (17a ed.)

Marcos, Imelda Romualdez. Social Services Improvement. [S.l: s.n.

Cita MLA (9a ed.)

Marcos, Imelda Romualdez. Social Services Improvement. s.n.