Yasso, Warren E.
New York: Holt, Rinehart and Winston, 1965
Buku Teks
Carson, Rachel L.
A Mentor Book, 1954
Buku Teks
Gorsky, N
Foreign Languages Publishing House, 1961
Buku Teks
LIPI Press, 2014
Majalah, Jurnal, Buletin
Carson, Rachel L.
Oxford University Press , 1967
Buku Teks