Hearn, William Edward
Colo F.B. Rothman, 1990
Buku Teks
Mander, Linden A.
Stanford University Press, 1948
Buku Teks
edited by Mason Haire
John Wiley & Sons, 1959
Buku Teks
edited by Mason Haire
John Wiley & Sons, 1959
Buku Teks
Carpenter, Philip L.
W B Saunders Company, 1975
Buku Teks