Analysis of information sources in references of the Wikipedia article "单萜" in Chinese language version.
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缺少标题 (帮助). 14 - Toxicological Aspects of Ingredients Used in Nonalcoholic Beverages. Duxford, United Kingdom: Woodhead Publishing. 2019 [2021-05-02]. ISBN 978-0-12-815270-6. (原始内容存档于2021-05-06).|chapterurl=
缺少标题 (帮助). Herbs of the Labiatae 2nd. Amsterdam: Academic Press. 2003 [2021-05-02]. ISBN 978-0-12-227055-0. (原始内容存档于2021-05-02).|chapterurl=
缺少标题 (帮助). Chapter 13: Essential oil profiles Second. Edinburgh: Churchill Livingstone. 2014 [2021-05-02]. ISBN 978-0-443-06241-4. (原始内容存档于2021-05-08).|chapterurl=
缺少标题 (帮助). 14 - Toxicological Aspects of Ingredients Used in Nonalcoholic Beverages. Duxford, United Kingdom: Woodhead Publishing. 2019 [2021-05-02]. ISBN 978-0-12-815270-6. (原始内容存档于2021-05-06).|chapterurl=
缺少标题 (帮助). Herbs of the Labiatae 2nd. Amsterdam: Academic Press. 2003 [2021-05-02]. ISBN 978-0-12-227055-0. (原始内容存档于2021-05-02).|chapterurl=
缺少标题 (帮助). Chapter 13: Essential oil profiles Second. Edinburgh: Churchill Livingstone. 2014 [2021-05-02]. ISBN 978-0-443-06241-4. (原始内容存档于2021-05-08).