Liongson, P. M., Vallejo, R. M., & Gregorio, E. G. (1981). A five-year development plan for the National Water Resources Council Information Center, 1981-1985.
Citace podle Chicago (17th ed.)Liongson, Pilar Manansala, Rosa M. Vallejo, a Enrico G. Gregorio. A Five-year Development Plan for the National Water Resources Council Information Center, 1981-1985. Quezon City : Institute of Library Science, University of the Philippines Diliman, 1981.
Citace podle MLA (9th ed.)Liongson, Pilar Manansala, et al. A Five-year Development Plan for the National Water Resources Council Information Center, 1981-1985. 1981.
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