Sobral, J. M. (1913). Contributions to the geology of the Nordingra region. Almquist & Wiksells boktryckeri.
Chicagoスタイル(17版)引用形式Sobral, José M. Contributions to the Geology of the Nordingra Region. Uppsala: Almquist & Wiksells boktryckeri, 1913.
MLA(8版)引用形式Sobral, José M. Contributions to the Geology of the Nordingra Region. Almquist & Wiksells boktryckeri, 1913.
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