Willis, Marjorie Canfield, author
J.B. Lippincott, 2008
Buku Teks
Wener, David
California : The hesperian foundation , 19888
Buku Teks
Willis, Marjorie Canfield, author
J.B. Lippincott, 2008
Buku Teks
Melville, Arbaella, author
Willliam Collins & Sons, 1987
Buku Referensi
Grant, Murray, 1926
Lea & Febiger, 1987
Buku Teks