Skousen, K. Fred, author
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Buku Teks
Carey, John L., author
Houghton Mifflin, 1977
Buku Teks
Brock, Horace R., author
Gregg Division, McGraw-Hill, 1986
Buku Teks
Salemba Empat, 2014
Buku Teks
Brock, Horace R., author
McGraw-Hill, 1986
Buku Teks