Krug, Ronald S., author
Springer-Verlag, 1992
Buku Teks
Fadem, Barbara, author
Wolter Kluwer, 2017
Buku Teks
Siegel, Sidney, author
McGraw-Hill , 1988
Buku Teks
Kevin R. Cox and Reginald G. Golledge, editors
Routledge, 2016
Buku Teks
Reilly, Dorothy E., author
Appleton-Century Crofts, 1978
Buku Teks