Karen Hartley; Chris MacRo. (1999). Snail (Bug Books Series) (Big.). Heinemann/Raintree.
Cita Chicago (17th ed.)Karen Hartley; Chris MacRo. Snail (Bug Books Series). Big. Heinemann/Raintree, 1999.
Cita MLA (9th ed.)Karen Hartley; Chris MacRo. Snail (Bug Books Series). Big. Heinemann/Raintree, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.