Phillips, Ralph W.
Livestock of china / Ralph W. Phillips
United states Government Printing Office, 1945
 Buku Teks
Stacy, Ralph W.
Modern college physiology / Ralph W. Stacy, John A. Santolucito
Mosby , 1966
 Buku Teks
Townsed, Ralph
Ways that are dark : the truth about China / Ralph Townsend
G.P. Putnam's Sons, 1933
 Buku Teks
Didin Hafidhuddin, author
Zakat dalam perekonomian modern
Gema Insani Press, 2002
 Buku Teks
Scurfield, Elizabeth, author
China
NTC Pub. Group, 1992
 Buku Teks
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