Young, Laura C.
W.B. Saunders, 1988
Buku Teks
Hoy, Wayne K., author
McGraw-Hill, 2013
Buku Teks
Lorentzen, Karen M., author
Warren H. Green, 1988
Buku Teks
Trecker, Harleigh B., author
Association Press, 1971
Buku Teks
Wilson, Louis Round, author
Columbia University, 1956
Buku Teks