Lenk, John D., author
McGraw-Hill, 1994
Buku Referensi
Lenk, John D., author
McGraw-Hill, 1993
Buku Referensi
Glaser, Barney G., author
Aldine, 1967
Buku Teks
Reinke, William A., author
The John Hopkins University Press , 1972
Buku Teks
Cambridge University Press, 2017
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