Ardley, N., & il. John Rignall, R. M. e. G. A. (1981). O mundo das aves. Verbo.
Chicagoスタイル(17版)引用形式Ardley, Neil, , Richard Millington e Graham Allen il. John Rignall. O Mundo Das Aves. Verbo, 1981.
MLA(8版)引用形式Ardley, Neil, , Richard Millington e Graham Allen il. John Rignall. O Mundo Das Aves. Verbo, 1981.
警告: この引用は必ずしも正確ではありません.