Folland, Sherman
Prentice-Hall, 2001
Buku Teks
edited by Alastair Gray
Open University Press, 2001
Buku Teks
Hicks, Lanis L.
Jones & Bartlett Learning, 2014
Buku Teks
by Ralph Hingson ... [et al.]
Mosby, 1981
Buku Teks
Mooney, Gavin H.
MacMillan Press , 1980
Buku Teks