APA
Lenard Y. H. R., . (1967). L'Art de la Conversation. New York; Evanston; London: Harper and Row.
Chicago
Lenard Yvone Hester Ralph, . 1967. L'Art de la Conversation. New York; Evanston; London: Harper and Row.
Harvard
Lenard Y. H. R., . (1967). L'Art de la Conversation. New York; Evanston; London: Harper and Row.
MLA
Lenard Yvone Hester Ralph, . L'Art de la Conversation. New York; Evanston; London: Harper and Row. 1967.
