Pilsbury, R. (1969). Clouds and weather. Batsford.
Cita Chicago (17th ed.)Pilsbury, R.K. Clouds and Weather. London: Batsford, 1969.
Cita MLA (9th ed.)Pilsbury, R.K. Clouds and Weather. Batsford, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.