APA (7th ed.) Zitazioa
Ray, S. K. (1925). Geological and petrographic Studies in the Hercynian mountains around Tiefenstein southern Black forest, Germany.
Chicago Style (17th ed.) Zitazioa
Ray, Suhrid Kumar. Geological and Petrographic Studies in the Hercynian Mountains Around Tiefenstein Southern Black Forest, Germany. 1925.
MLA (9th ed.) Zitazioa
Ray, Suhrid Kumar. Geological and Petrographic Studies in the Hercynian Mountains Around Tiefenstein Southern Black Forest, Germany. 1925.
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