Kittelsen, T., & Borge, P. E. (1998). Troll. N W Damm & Son.
Tohutoru Kātū Chicago (17th ed.)Kittelsen, Th, me Per Erik Borge. Troll. Oslo: N W Damm & Son, 1998.
Tohutoro MLA (9th ed.)Kittelsen, Th, me Per Erik Borge. Troll. N W Damm & Son, 1998.
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