APA (7th ed.) Citation

Otto, E. (1930). German conversation-grammar: Practical method of learning the German language (33.ed.). Groos.

Chicago Style (17th ed.) Citation

Otto, Emil. German Conversation-grammar: Practical Method of Learning the German Language. 33.ed. Heidelberg: Groos, 1930.

MLA (9th ed.) Citation

Otto, Emil. German Conversation-grammar: Practical Method of Learning the German Language. 33.ed. Groos, 1930.

Warning: These citations may not always be 100% accurate.