Manier, E. (1978). The young Darwin and his cultural circle: A study of influences which helped shape the language and logic of the first drafts of the theory of natural selection. Reidel.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Manier, Edward. The Young Darwin and His Cultural Circle: A Study of Influences Which Helped Shape the Language and Logic of the First Drafts of the Theory of Natural Selection. Dordrecht [u.a.]: Reidel, 1978.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Manier, Edward. The Young Darwin and His Cultural Circle: A Study of Influences Which Helped Shape the Language and Logic of the First Drafts of the Theory of Natural Selection. Reidel, 1978.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.