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Chicago-Zitierstil (17. Ausg.)Philippines. Ecosystems Research and Development Bureau. Integrated Research and Development Plans and Programs of the Department of Environment and Natural Resources, 1989-1993. College, Laguna: Department of Environment and Natural Resources, Ecosystems Research and Development Bureau, 1989.
MLA-Zitierstil (9. Ausg.)Philippines. Ecosystems Research and Development Bureau. Integrated Research and Development Plans and Programs of the Department of Environment and Natural Resources, 1989-1993. Department of Environment and Natural Resources, Ecosystems Research and Development Bureau, 1989.