APA

Gilbert D. W., . (1966). Study in depth. Englewood Cliffs, N.J: Prentice-Hall.

Chicago

Gilbert Doris W, . 1966. Study in depth. Englewood Cliffs, N.J: Prentice-Hall.

Harvard

Gilbert D. W., . (1966). Study in depth. Englewood Cliffs, N.J: Prentice-Hall.

MLA

Gilbert Doris W, . Study in depth. Englewood Cliffs, N.J: Prentice-Hall. 1966.