Perrin, Karen M.
Jones & Bartlett Learning, 2016
Buku Teks SO
Issel, L. Michele
Jones & Bartlett Learning, 2014
Buku Teks SO
Miller, M. Clinton
University Microfilms International, 1978
Buku Teks SO
edited by Kerr L. White and Maureen M. Henderson
Oxford University Press, 1976
Buku Teks SO
Issel, L. Michele
Jones and Barlett Publ., 2004
Buku Teks