APA

Paul H., . (1889). Principles of the History of Language. New York: Macmillan and Co.

Chicago

Paul Hermann, . 1889. Principles of the History of Language. New York: Macmillan and Co.

Harvard

Paul H., . (1889). Principles of the History of Language. New York: Macmillan and Co.

MLA

Paul Hermann, . Principles of the History of Language. New York: Macmillan and Co. 1889.