Philippines (Republic). Department of Public Works, Planning and Project Development Office, Project Division, & Transportation and Communications. (1973). Feasibility study: Quirino Highway. [s.n.].
Cita Chicago (17th ed.)Philippines (Republic). Department of Public Works, Planning and Project Development Office, Project Division, i Transportation and Communications. Feasibility Study: Quirino Highway. Manila: [s.n.], 1973.
Cita MLA (9th ed.)Philippines (Republic). Department of Public Works, et al. Feasibility Study: Quirino Highway. [s.n.], 1973.
Atenció: Aquestes cites poden no estar 100% correctes.