Washington, D.C. I.C.A. 1957,
Buku Teks
Michael N. Schmitt, general editor
Cambridge University Press, 2013
Buku Teks
The University of Winconsin Press, 1977
Buku Teks
Abrahamsen, Martin A.
McGraw-Hill Book , 1976
Buku Teks
Wodczak, Michal
Springer, 2012
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