APA

clemson d. &. w., .MY FIRST maths book. london: dorling kindersley.

Chicago

clemson david & wendy, .MY FIRST maths book. london: dorling kindersley.

Harvard

clemson d. &. w., .MY FIRST maths book. london: dorling kindersley.

MLA

clemson david & wendy, .london: dorling kindersley. .