Boorder, H. d. (1965). Petrological investigations in the Aguiar da Beira granite area, northern Portugal. Grafisch Centrum Deltro.
Čikaški stil citiranja (17. izdanje)Boorder, Hugo de. Petrological Investigations in the Aguiar Da Beira Granite Area, Northern Portugal. Rotterdam, Neth.: Grafisch Centrum Deltro, 1965.
MLA način citiranja (8. izdanje)Boorder, Hugo de. Petrological Investigations in the Aguiar Da Beira Granite Area, Northern Portugal. Grafisch Centrum Deltro, 1965.
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