(1972). Proposed road construction and /or improvement for the Bicol region. [s.n.].
Cita Chicago (17th ed.)Proposed Road Construction and /or Improvement for the Bicol Region. [Manila]: [s.n.], 1972.
Cita MLA (9th ed.)Proposed Road Construction and /or Improvement for the Bicol Region. [s.n.], 1972.
Atenció: Aquestes cites poden no estar 100% correctes.