Mark A. Kalthoff. [https://www.asa3.org/ASA/PSCF/2008/PSCF6-08Kalthoff.pdf Optimistic Evolutionists: The Progressive Science and
Religion of Joseph LeConte, Henry Ward Beecher, and Lyman Abbott] // Perspectives on Science and Christian Faith. — 2008. Архивировано 15 мая 2022 года.
Mark A. Kalthoff. [https://www.asa3.org/ASA/PSCF/2008/PSCF6-08Kalthoff.pdf Optimistic Evolutionists: The Progressive Science and
Religion of Joseph LeConte, Henry Ward Beecher, and Lyman Abbott] // Perspectives on Science and Christian Faith. — 2008. Архивировано 15 мая 2022 года.