Carr-Saunders, A. M., author
Clarendon Press, 1933
Buku Teks
Watson, Jean, author
Davis, 2005
Buku Teks
Watson, Jean, author
Davis, 2005
Buku Teks
Wilson, Gilbert, author
George Allen, 1982
Buku Teks
edited by Norman A. Polansky
University of Chicago Press, 1975
Buku Teks