Posner, Richard A., author
Harvard University Press, 2002
Buku Teks
Lippmann, Walter, author
The New American Library, 1956
Buku Teks
edited by Scott Walden
Blackwell, 2007
Buku Teks
Sinha, Surya Prakash, author
West Pub. Co., 1993
Buku Teks
Siti Aminah, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1988
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