Porter, David A., author
Mosby, 2008
Buku Teks
Thomas H. Berquist, editor
Wolters Kluwer Lippincott , 2011
Buku Teks
Alexander, Ralph S.
Ginn and Co. , 1953
Buku Teks
Alexander, Ralph S.
Richard D. Irwin, 1956
Buku Teks
Alexander, Ralph
Richard D. Irwin , 1961
Buku Teks