Waite, Mitchell
H.W. Sams, 1980
Buku Teks
Dwisetya Safirna Widyaratih
2014
UI - Skripsi (Membership)
Barden, William Jr.
Howard W. Sams & Co., 1978
Buku Referensi
Sanderson, Peter C.
Butterworth, 1980
Buku Teks
Swanson, Paul
McGraw-Hill, 1982
Buku Teks