- E-bookChinese Flash Cards Kit Ebook Volume 1Philip Yungkin Lee
- E-book250 Essential Chinese Characters Volume 2Philip Yungkin Lee
- E-bookChinese Flash Cards Kit Ebook Volume 2Philip Yungkin Lee
- E-bookChinese Flash Cards Volume 3Philip Yungkin Lee
- E-bookEssential ChinesePhilip Yungkin Lee
- E-bookPeriplus Pocket Mandarin Chinese DictionaryPhilip Yungkin Lee