Ferguson, Wallace K., author
Houghton Mifflin, 1962
Buku Teks
Alenka Selih
Springer, 2012
eBooks
edited by Regina Cowen Karp
Oxford University Press, 1993
Buku Teks
edited by Diego A. Vazquez-Brust and Joseph Sarkis
Springer, 2012
eBooks
U.S. Government Printing Office, 1969
Buku Teks