National Library Service of Papua New Guinea. School Library Service. (1982). Simplified Dewey classification scheme and subject headings: For high schools in Papua New Guinea. School Library Service, National Library of Papua New Guinea.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Library Service of Papua New Guinea. School Library Service. Simplified Dewey Classification Scheme and Subject Headings: For High Schools in Papua New Guinea. [Port Moresby]: School Library Service, National Library of Papua New Guinea, 1982.
Παραπομπή σε μορφή MLA (9th εκδ.)National Library Service of Papua New Guinea. School Library Service. Simplified Dewey Classification Scheme and Subject Headings: For High Schools in Papua New Guinea. School Library Service, National Library of Papua New Guinea, 1982.