Philippine Council for Agriculture, Forestry and Natural Resources Research and Development. Research Information Storage and Retrieval System Committee. (1989). RETRES technical abstracting manual. Philippine Council for Agriculture, Forestry and Natural Resources Research and Development.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Philippine Council for Agriculture, Forestry and Natural Resources Research and Development. Research Information Storage and Retrieval System Committee. RETRES Technical Abstracting Manual. Los Banos, Laguna: Philippine Council for Agriculture, Forestry and Natural Resources Research and Development, 1989.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Philippine Council for Agriculture, Forestry and Natural Resources Research and Development. Research Information Storage and Retrieval System Committee. RETRES Technical Abstracting Manual. Philippine Council for Agriculture, Forestry and Natural Resources Research and Development, 1989.