Hanbury, Benjamin (1844). Historical Memorials Relating to the Independents Or Congregationalists: From Their Rise to the Restoration of the Monarchy. Vol.3. hlm.118, 635.
Hunt, John (2010) [1870]. Religious Thought in England, from the Reformation to the End of Last Century; A Contribution to the History of Theology. Vol.2. General Books LLC. hlm.5. ISBN1-150-98096-6.
Worden, Blair (2009). The English Civil Wars 1640–1660. London: Penguin Books. ISBN0-14-100694-3.
Atribusi
Artikel inimenyertakan teks dari suatu terbitan yang sekarang berada pada ranah publik:Anonymous (1911). "Roundhead". Dalam Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol.23 (Edisi 11). Cambridge University Press. hlm.772.;