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