1
by Smith
Published 2000
2
by Nyman
Published 2006
3
by Anggraeni
Published 2006
4
5
by Assyaukanie
Published 2009
6
by Pribadi
Published 1999
7
by Mann
Published 2000
8
Published 1999
9
by Siregar
10
by Suryadinata, Leo.
Published 2002
11
Published 2002
12
Published 2004
13
Published 1984
14
Published 1984
15
Published 1999
16
by Barton
Published 2005
17
Published 1989
18
19
Published 2020