APA

Adamson J., Adamson G., .Topsy and Tim have a birthday party. London: ladybird.

Chicago

Adamson Jean, Adamson Gareth, .Topsy and Tim have a birthday party. London: ladybird.

Harvard

Adamson J., Adamson G., .Topsy and Tim have a birthday party. London: ladybird.

MLA

Adamson Jean, Adamson Gareth, .London: ladybird. .