Gaya APA

900. (). : Ladybird Book.

Gaya Chicago

900. Duck Stories for 2 year olds. : Ladybird Book, . 08/C/ING/057.

Gaya MLA

900. Duck Stories for 2 year olds. : Ladybird Book, . 08/C/ING/057.

Gaya Turabian

900. : Ladybird Book, . 08/C/ING/057.