Meicr, Richard L., author
McGraw-Hill, 1965
Buku Teks
Fitagerald, Hiram E
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Buku Teks
Liebert, Robert M., 1942-, author
Prentice-Hall, 1986
Buku Teks
Hurlock, Elizabeth Bergner, 1898-, author
Tata McGraw-Hill, 1979
Buku Teks
Upton, Penney, author
Learning Matters, 2011
Buku Teks