Development Academy of the Philippines. Productivity and Development Center. (1980). Human factors affecting productivity: An exploratory study. Productivity and Development Center, Development Academy of the Philippines.
Chicago-referens (17:e uppl.)Development Academy of the Philippines. Productivity and Development Center. Human Factors Affecting Productivity: An Exploratory Study. [Pasig, Metro Manila: Productivity and Development Center, Development Academy of the Philippines, 1980.
MLA-referens (9:e uppl.)Development Academy of the Philippines. Productivity and Development Center. Human Factors Affecting Productivity: An Exploratory Study. Productivity and Development Center, Development Academy of the Philippines, 1980.
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