Helama, S., Holopainen, J., Macias Fauria, M., Timonen, M., & Mielikainen, K. (2013). A chronology of climatic downturns through the mid- and late- Holocene: Tracing the distant effects of explosive eruptions from palaeoclimatic and historical evidence in northern Europe. Norsk Polarinstitutt.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিHelama, S., J. Holopainen, M. Macias Fauria, M. Timonen, এবং K. Mielikainen. A Chronology of Climatic Downturns Through the Mid- and Late- Holocene: Tracing the Distant Effects of Explosive Eruptions from Palaeoclimatic and Historical Evidence in Northern Europe. Norsk Polarinstitutt, 2013.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিHelama, S., et al. A Chronology of Climatic Downturns Through the Mid- and Late- Holocene: Tracing the Distant Effects of Explosive Eruptions from Palaeoclimatic and Historical Evidence in Northern Europe. Norsk Polarinstitutt, 2013.