APA

derwent l., . (19). the children's picture dicilnary. london: colling.

Chicago

derwent lavinia, . 19. the children's picture dicilnary. london: colling.

Harvard

derwent l., . (19). the children's picture dicilnary. london: colling.

MLA

derwent lavinia, . the children's picture dicilnary. london: colling. 19.