- Modern Swahili Dictionary: Swahili-English, English-Swahili
- Swahili Children's Dictionary: Illustrated Swahili-English, English-Swahili
- Swahili Learner's Dictionary: Swahili-English, English-Swahili
- Modern Yoruba: A Concise Introduction to the Yoruba Language
- Diccionario Swahili Para Nios: Swahili-Espaol Ilustrado, Espaol-Swahili