Sally B. Olds, Marcia L. London, Patricia A. Wieland Ladewig, Michele R. Davidson
Pearson Education, 2004
Buku Referensi
Springer, 2012
eBooks
edited by W.A. Paton
Ronald Press, 1955
Buku Teks
editor, Harry Helms [and others]
McGraw-Hill, 1983
Buku Referensi
William J. Hardcastle, John Laver, Fiona E. Gibbon, editor
Wiley-Blackweell, 2013
Buku Teks