Arneson, Ben A
The Democratic Monorchies of Scandinavia
D.Van Nostrand Company, 1938
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Innes, Hammond, 1913-
Scandinavia
Time Inc., 1963
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Potgieter E. J.
Albert
W.E.J Tjeenk Willink, 1914
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Scandinavia : between East and West
edited by Henning Friis
Cornel University Press, 1950
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Paridah Abd. Samad
The new age of the kings : modern monarchies in Malaysia and the world
Partisan Publication, 2014
 Buku Teks