Philippines. Department of Environment and Natural Resources. Forest Research Institute. Conifer Research Center. (1982). Research program on silvichemicals production from the endemic pines. DENR.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Philippines. Department of Environment and Natural Resources. Forest Research Institute. Conifer Research Center. Research Program on Silvichemicals Production from the Endemic Pines. Baguio City: DENR, 1982.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Philippines. Department of Environment and Natural Resources. Forest Research Institute. Conifer Research Center. Research Program on Silvichemicals Production from the Endemic Pines. DENR, 1982.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.