APA

Lang G. E., . (1961). Old age in America. New York: H. W. Wilson Co.

Chicago

Lang Gladys Engel, . 1961. Old age in America. New York: H. W. Wilson Co.

Harvard

Lang G. E., . (1961). Old age in America. New York: H. W. Wilson Co.

MLA

Lang Gladys Engel, . Old age in America. New York: H. W. Wilson Co. 1961.