Waldt, Simone, author
Thieme, 2014
Buku Referensi
Hildebrand, David K., 1940-, author
John Wiley & Sons, 1977
Buku Teks
Reynolds, H.T., author
The Free Press, 1977
Buku Teks
Kartomi, Margaret J., author
University of Chicago Press, 1990
Buku Teks
Rumyantsev, S., author
MIR Publishers, 1967
Buku Teks