APA

lipkind w., duvoisin r., . (1966). nubber bear. london: faber and faber.

Chicago

lipkind william, duvoisin roger, . 1966. nubber bear. london: faber and faber.

Harvard

lipkind w., duvoisin r., . (1966). nubber bear. london: faber and faber.

MLA

lipkind william, duvoisin roger, . nubber bear. london: faber and faber. 1966.