Tan, S.T. , author
PWS Publishing Company, 1994
Buku Teks
Horner, Donald H., author
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Buku Teks
White, Paul A., author
Dickenson, 1970
Buku Teks
Alexander, Daniel C., author
Brooks/Cole Cengage Learning, 2011
Buku Teks
Brixey, John C., author
Holt, Rinehart and winston, 1954
Buku Teks