Parker, S. (1986). Science project book of plants. Marshall Cavendish.
Cita Chicago (17th ed.)Parker, Steve. Science Project Book of Plants. London: Marshall Cavendish, 1986.
Cita MLA (9th ed.)Parker, Steve. Science Project Book of Plants. Marshall Cavendish, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.