Erickson, Bonnie H., author
Open University Press, 1977
Buku Teks
Dixon, Wilfrid J. (Wilfrid Joseph), author
McGraw-Hill, 1983
Buku Teks
Peck, Roxy., author
Cebgage Learning, 2016
Buku Teks
Whitehead, Paul, author
Pitman, 1992
Buku Teks
Larson, Harold J.
John Wiley & Sons, 1975
Buku Teks