Buskirk, Richard Hobart, 1927-, author
Holt Rinehart, 1961
Buku Teks
Buskirk, Richard Hobart, 1927-, author
Holt Rinehart, 1970
Buku Teks
Keegan, Warren J., author
Prentice-Hall, 1980
Buku Teks
Markin, Rom J., author
John Wiley & Sons, 1982
Buku Teks
edited by David B. Montgomery and Glen L. Urban
Prentice-Hall, 1970
Buku Teks