Pet, Paul C.
Elmar, 1994
Buku Referensi
Bernlef, J.
Querido, 1977
Buku Teks
Freedman, Ronald
Princeton University Press, 1969
Buku Teks SO
Knowles, Helen K.
Bond Wheelwright, 1955
Buku Teks
Hill, Reuben
Univeresity of North Carolina Press, 1965
Buku Teks SO