Richard Parsons. (2003). Key Stage Two Science: Life Cycles. Coordination Group Publications Ltd.
Cita Chicago (17th ed.)Richard Parsons. Key Stage Two Science: Life Cycles. Coordination Group Publications Ltd, 2003.
Cita MLA (9th ed.)Richard Parsons. Key Stage Two Science: Life Cycles. Coordination Group Publications Ltd, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.