Ward, Morgan
Reading, Mass. Addison-Wesley c.1964,
Buku Teks
Wheeler, Ruric E., author
Brooks/Cole, 1967
Buku Teks
Wheeler, Ruric E., author
Brooks/Cole, 1970
Buku Teks
Wheeler, Ruric E., author
Brook/Cole, 1969
Buku Teks
Willson, Jack D.
McGraw-Hill , 1967
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