Hornaday, W. T. (1909). Popular official guide to the New York zoological park (10th ed.). New York Zoological Society.
Chicagoスタイル(17版)引用形式Hornaday, William T. Popular Official Guide to the New York Zoological Park. 10th ed. New York: New York Zoological Society, 1909.
MLA(9版)引用形式Hornaday, William T. Popular Official Guide to the New York Zoological Park. 10th ed. New York Zoological Society, 1909.
警告: この引用は必ずしも正確ではありません.