Key to the exercises in the new method of learning to read, write, and speak a language in six months,
adapted to the German. ... added, notes referring to the principles explained in the method,
carefully revised and corrected.

APA Citation

Ollendorff, H. G. (Heinrich Gottfried). (1850). Key to the exercises in the new method of learning to read, write, and speak a language in six months: adapted to the German. ... added, notes referring to the principles explained in the method. 5. ed. London: Whittaker and Co. [etc.].

MLA Citation

Ollendorff, H. G. (Heinrich Gottfried), 1803-1865. Key to the Exercises In the New Method of Learning to Read, Write, And Speak a Language In Six Months: Adapted to the German. ... Added, Notes Referring to the Principles Explained In the Method. 5. ed. London: Whittaker and Co. [etc.], 1850.