1. Dictionaries and dictionaries: Dictionaries and dictionaries are the most common types of reference books, which provide information such as the definition, spelling, pronunciation and usage of words, phrases and idioms.
2. Encyclopedia: Encyclopedia is a comprehensive reference book, which contains knowledge and information of various disciplines.
3. Manuals and guides: Manuals and guides provide practical information about specific topics or skills, such as operation manuals and travel guides.
4. Yearbooks and catalogues: Yearbooks and catalogues provide information about important events, people and institutions in a specific year or field.
5. Chart set: Chart set presents data and information in the form of graphs and tables, such as statistical charts and maps.
6. Citation index: Citation index provides citation information to help readers find relevant literature.
7. Standards and specifications: Standards and specifications provide technical requirements and guiding principles for specific industries or fields.
8. Glossary: Glossary explains technical terms and abbreviations in specific fields.