APA
Jespersen O., . (1904). How to teach a Foreign language. London: George Allen & Unwin.
Chicago
Jespersen Otto, . 1904. How to teach a Foreign language. London: George Allen & Unwin.
Harvard
Jespersen O., . (1904). How to teach a Foreign language. London: George Allen & Unwin.
MLA
Jespersen Otto, . How to teach a Foreign language. London: George Allen & Unwin. 1904.