Gill, James O, author
PPM, 2002
Buku Teks
Gill, James O., author
PPM, 2002
Buku Teks
S. Prajudi Atmosudirdjo, author
[publisher not identified], 1973
Buku Teks
S. Prajudi Atmosudirdjo, author
Februari, 1973
Buku Teks
Manullang, M., author
Gajah Mada University Press, 2002
Buku Teks