Tobies, Renate, author
Springer, 2012
eBooks
Cressey, George Babcock, 1896-1963, author
J.B. Lippincott, 1960
Buku Teks
Crank, John
Oxford Univ. Press , 1962
Buku Teks
Tsokos, Chris P., 1937-, author
Brooks/Cole Cengage Learning, 2012
Buku Teks
Arnold, A., author
Prentice-Hall, 1996
Buku Teks