APA (7th ed.) Citation

Otto, E. (1876). German conversation-grammar: A new and practical method of learning the German language (16th ed.). Julius Groos.

Chicago Style (17th ed.) Citation

Otto, Emil. German Conversation-grammar: A New and Practical Method of Learning the German Language. 16th ed. Heidelberg: Julius Groos, 1876.

MLA (9th ed.) Citation

Otto, Emil. German Conversation-grammar: A New and Practical Method of Learning the German Language. 16th ed. Julius Groos, 1876.