edited by Robert Richards
Littlefield, Adams, 1955
Buku Referensi
Hart, James D., author
Oxford University Press, 1986
Buku Referensi
Wachner, Clarence W., author
Macmillan, 1963
Buku Teks
Hudiningsih, author
1988
UI - Tesis (Membership)
Hart, James D., author
Oxford University Press, 1986
Buku Referensi