Cather, Willa, 1873-1947, author
Vintage Books, 1992
Buku Teks
Cather, Willa, 1873-1947, author
A Signet Classic, 1988
Buku Teks
edited by Leo Suryadinata
Institute of South East Asia Studies, 2012
eBooks
Spencer, Donald D.
Ginn-Blaisdell, 1968
Buku Referensi
Wyatt, Allen L.
McGraw-Hill, 1990
Buku Referensi