Hayward, J. (1987). Lovebirds and their colour mutations. [S.l.]: New York.
Citación estilo ChicagoHayward, Jim. Lovebirds and Their Colour Mutations. [S.l.]: New York, 1987.
Cita MLAHayward, Jim. Lovebirds and Their Colour Mutations. [S.l.]: New York, 1987.
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