APA

Berlitz schools of languages of America, . (1987). The Berlitz self-teacher. New York: Perigee Books.

Chicago

Berlitz schools of languages of America, . 1987. The Berlitz self-teacher. New York: Perigee Books.

Harvard

Berlitz schools of languages of America, . (1987). The Berlitz self-teacher. New York: Perigee Books.

MLA

Berlitz schools of languages of America, . The Berlitz self-teacher. New York: Perigee Books. 1987.