Markham, C. R. (1921). The lands of silence: A history of Arctic and Antarctic exploration by Sir Clements R. Markham, K.C.B., F.R.S (1a. ed.). University Press.
Citace podle Chicago (17th ed.)Markham, Clements Robert. The Lands of Silence: A History of Arctic and Antarctic Exploration by Sir Clements R. Markham, K.C.B., F.R.S. 1a. ed. Cambridge: University Press, 1921.
Citace podle MLA (9th ed.)Markham, Clements Robert. The Lands of Silence: A History of Arctic and Antarctic Exploration by Sir Clements R. Markham, K.C.B., F.R.S. 1a. ed. University Press, 1921.
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