Albert, Arthur L. (Arthur Lemuel), 1899
Buku Teks
Zbar, Paul B., author
Macmillan/McGraw-Hill, 1992
Buku Referensi
Zherebtsov, I., author
Mir Publishers, 1969
Buku Teks
Albert, Arthur Lemuel
McGraw-Hill Book Company, Inc., 1943
Buku Teks
Floyd, Thomas L., author
Prentice-Hall, 1998
Buku Teks