Jacobs, Philip
Aspen Publication, 1987
Buku Teks
Hicks, Lanis L.
Jones & Bartlett Learning, 2014
Buku Teks
edited by Hoarst Noack
University Park Press , 1980
Buku Teks SO
edited by Allen D. Spiegel, Donald Rubin and Shelley B. Frost
Human Science Press, 1981
Buku Teks
Willis, Marjorie Canfield
J.B. Lippincott, 2008
Buku Teks SO