Daniel, Hawthorne
G.P. Putnam's Sons , 1943
Buku Teks
Oliver, Douglas L.
Harvard University Press, 1951
Buku Teks
Oliver, Douglas L.
Harvard University Press, 1958.
Buku Teks
edited by Norman and Ngaire Douglas
Angus & Robertson, 1989
Buku Referensi
Grattan, C. Hartley
The University of Michigan Press, 1963
Buku Teks