Cushman, K. (1994). Catherine, called Birdy. Harper Trophy.
Cita Chicago Style (17a ed.)Cushman, Karen. Catherine, Called Birdy. New York: Harper Trophy, 1994.
Cita MLA (9a ed.)Cushman, Karen. Catherine, Called Birdy. Harper Trophy, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.