Gregson, M. (1975). Circus (Corgi/ Carusel edition.). Corgi/ Carusel Book.
Tohutoru Kātū Chicago (17th ed.)Gregson, Maureen. Circus. Corgi/ Carusel edition. London: Corgi/ Carusel Book, 1975.
Tohutoro MLA (9th ed.)Gregson, Maureen. Circus. Corgi/ Carusel edition. Corgi/ Carusel Book, 1975.
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