Serrats, Marta
Page one publishing pte ltd, 2011
Buku Referensi
Mega Parlintara Kusmirat
2018
UI - Skripsi Membership
Pile, John F.
H.N. Abrams, 1995
Buku Teks SO
Massachusetts: Rockport Publishers,, 1997
Buku Teks SO
Indecs Publishing, 1990
Buku Referensi