Köpf, U. (2011). Vikings. Religion Past and Present online. doi:10.1163/1877-5888_rpp_SIM_224248
Chicago Style (17th ed.) CitationKöpf, Ulrich. "Vikings." Religion Past and Present Online 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_224248.
MLA (8th ed.) CitationKöpf, Ulrich. "Vikings." Religion Past and Present Online, 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_224248.
Warning: These citations may not always be 100% accurate.