APA

Yates I., Busby A., . (2011). The three billy goats gruff. London: Ladybird.

Chicago

Yates Irane, Busby Ailie, . 2011. The three billy goats gruff. London: Ladybird.

Harvard

Yates I., Busby A., . (2011). The three billy goats gruff. London: Ladybird.

MLA

Yates Irane, Busby Ailie, . The three billy goats gruff. London: Ladybird. 2011.