Gregson, M. (1975). Circus (Corgi/ Carusel edition.). Corgi/ Carusel Book.
Cita Chicago (17th ed.)Gregson, Maureen. Circus. Corgi/ Carusel edition. London: Corgi/ Carusel Book, 1975.
Cita MLA (9th ed.)Gregson, Maureen. Circus. Corgi/ Carusel edition. Corgi/ Carusel Book, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.