Cita APA (7th ed.)

Murray, W., & Aitchison, M. (1979). Out in the sun. Ladybird Books.

Cita Chicago (17th ed.)

Murray, William, i Martin Aitchison. Out in the Sun. Loughborough [England]: Ladybird Books, 1979.

Cita MLA (9th ed.)

Murray, William, i Martin Aitchison. Out in the Sun. Ladybird Books, 1979.