Verma, Harish L.
John Wiley & Sons, 1978
Buku Teks
Markland, Robert E., author
John Wiley & Sons, 1987
Buku Teks
Theil, Henri, author
McGraw-Hill Book Co. , 1965
Buku Teks
Levin, Richard I., author
McGraw-Hill International, c1982
Buku Teks
Hiller, Fredick S.
McGraw-Hill Higher Education, 2001
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