Richard, H. (1961). Birds' nest: A field guide an identification manual to the nests birds of the united states east of the one hundred meridian. Ives Washburn.
Citace podle Chicago (17th ed.)Richard, Headstrom. Birds' Nest: A Field Guide an Identification Manual to the Nests Birds of the United States East of the One Hundred Meridian. New York: Ives Washburn, 1961.
Citace podle MLA (9th ed.)Richard, Headstrom. Birds' Nest: A Field Guide an Identification Manual to the Nests Birds of the United States East of the One Hundred Meridian. Ives Washburn, 1961.
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