Birch, W. d. G. (1907). History of Scottish seals from the 11th. to the 17th century, with upwards of 200 ill. Mackay.
Citace podle Chicago (17th ed.)Birch, Walter de Gray. History of Scottish Seals from the 11th. to the 17th Century, with Upwards of 200 Ill. Stirling: Mackay, 1907.
Citace podle MLA (8th ed.)Birch, Walter de Gray. History of Scottish Seals from the 11th. to the 17th Century, with Upwards of 200 Ill. Mackay, 1907.
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