Philippines (Republic). Department of Trade and Industry. (1991). The master plan study on the project CALABAR: Interim report. Japan International Cooperation Agency.
Cita Chicago (17th ed.)Philippines (Republic). Department of Trade and Industry. The Master Plan Study on the Project CALABAR: Interim Report. [Tokyo]: Japan International Cooperation Agency, 1991.
Cita MLA (9th ed.)Philippines (Republic). Department of Trade and Industry. The Master Plan Study on the Project CALABAR: Interim Report. Japan International Cooperation Agency, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.