National Library of the Philippines. Impact stories: A publication for library and information services month (Librarian edition.).
芝加哥风格引文National Library of the Philippines. Impact Stories: A Publication for Library and Information Services Month. Librarian edition.
MLA引文National Library of the Philippines. Impact Stories: A Publication for Library and Information Services Month. Librarian edition.
警告：这些引文格式不一定是100％准确.