- Ahn's Introductory Practical Course to Acquire the French Language, by a Short and Easy Method
- Praktischer Lehrgang zur schnellen und leichten Erlernung der englischen Sprache (German Edition)
- Ahn's Introductory Practical Course to Acquire the French Language, by a Short and Easy Method
- Ahn-OEhlschlæger's Pronouncing Method of the German Language: First Course
- Pronouncing German Reader









