Eifrig, C. W. G. (1911). The Birds of Ottawa, continued. Zenodo.
Chicagoスタイル(17版)引用形式Eifrig, Charles William Gustav. The Birds of Ottawa, Continued. Zenodo, 1911.
MLA(9版)引用形式Eifrig, Charles William Gustav. The Birds of Ottawa, Continued. Zenodo, 1911.
警告: この引用は必ずしも正確ではありません.