Proffit, William R, author
Mosby, 2000
Buku Referensi
Harkati Dewanto, author
Gadjah Mada University Press, 1993
Buku Teks
Scuzzo, Giuseppe, author
Quintessenz Verlag, 2003
Buku Teks
Gill, Daljit S., author
EGC, 2016
Buku Teks
Goyal, Sandeep, author
CBS Publishers, 2015
Buku Teks