Varney, Helen
Blackwell Scientific Publications, 1987
Buku Teks
Schweiger, Joyce L., author
John Wiley & Sons, 1980
Buku Teks
June, Dale L., author
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Chambers, John C. (John Carlton), 1928-, author
John Wiley & Sons, 1974
Buku Teks
edited by B.C. Lemke, James Don Edwards
Charles E. Merrill, 1961
Buku Teks