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Lewis, Norman
New York Harper and Row 1963
Buku Referensi
Sale, William N (Jr)
New York WW Norton c1963
Buku Teks
Ho Kan-Chih
Peking: Foreign Language Press, 1959
Buku Teks
Wichman, K., author
New York, David Mckay Company
Buku Referensi