APA

Cooper S., Bignell J., . (2003). First Words. London: Letts.

Chicago

Cooper Stephanie, Bignell Jacqui, . 2003. First Words. London: Letts.

Harvard

Cooper S., Bignell J., . (2003). First Words. London: Letts.

MLA

Cooper Stephanie, Bignell Jacqui, . First Words. London: Letts. 2003.