APA

Ainsworth A., Holmes S., . (1993). The Ugly Duckling. London: Ladybird.

Chicago

Ainsworth Alison, Holmes Stephen, . 1993. The Ugly Duckling. London: Ladybird.

Harvard

Ainsworth A., Holmes S., . (1993). The Ugly Duckling. London: Ladybird.

MLA

Ainsworth Alison, Holmes Stephen, . The Ugly Duckling. London: Ladybird. 1993.