Ollendorff, H. G. 1. (1861). A new method of learning to read, write, and speak a language in six months, adapted to the French, for the use of schools and private teachers (9th ed., carefully rev., corr., and augm. .). London Paris: Whittaker and Co. At the Author's.

Ollendorff, Heinrich Gottfried 1803-1865. A New Method of Learning to Read, Write, and Speak a Language in Six Months, Adapted to the French, for the Use of Schools and Private Teachers. 9th ed., carefully rev., corr., and augm. . London Paris: Whittaker and Co. At the Author's, 1861.

Ollendorff, Heinrich Gottfried 1803-1865. A New Method of Learning to Read, Write, and Speak a Language in Six Months, Adapted to the French, for the Use of Schools and Private Teachers. 9th ed., carefully rev., corr., and augm. . London Paris: Whittaker and Co. At the Author's, 1861.