Leaf, S. (2013). A love affair with birds: The life of Thomas Sadler Roberts. University of Minnesota Press.
Citace podle Chicago (17th ed.)Leaf, Sue. A Love Affair with Birds: The Life of Thomas Sadler Roberts. Minneapolis: University of Minnesota Press, 2013.
Citace podle MLA (9th ed.)Leaf, Sue. A Love Affair with Birds: The Life of Thomas Sadler Roberts. University of Minnesota Press, 2013.
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