Cita APA (7th ed.)

LADYBIRD BOOKS LTD. READ IT YOURSELF WITH LADYBIRD THE FAMILY COMPUTER LEVEL- 1. LADYBIRD BOOKS LTD.

Cita Chicago (17th ed.)

LADYBIRD BOOKS LTD. READ IT YOURSELF WITH LADYBIRD THE FAMILY COMPUTER LEVEL- 1. LONDON: LADYBIRD BOOKS LTD.

Cita MLA (9th ed.)

LADYBIRD BOOKS LTD. READ IT YOURSELF WITH LADYBIRD THE FAMILY COMPUTER LEVEL- 1. LADYBIRD BOOKS LTD.

Atenció: Aquestes cites poden no estar 100% correctes.