Albacea, Z. V., & Gironella, A. I. N. (1996). Profile and manpower contribution to production of the special sectors of the Philippine population: Volume 4, the senior citizens. National Statisctics Office.
Chicago-viite (17. p.)Albacea, Zita VJ, ja Ann Inez N. Gironella. Profile and Manpower Contribution to Production of the Special Sectors of the Philippine Population: Volume 4, the Senior Citizens. Manila: National Statisctics Office, 1996.
MLA-viite (9. p.)Albacea, Zita VJ, ja Ann Inez N. Gironella. Profile and Manpower Contribution to Production of the Special Sectors of the Philippine Population: Volume 4, the Senior Citizens. National Statisctics Office, 1996.
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