Stanat, Donald D.
Prentice-Hall, 1977
Buku Teks
Universitas Indonesia, 1989
UI - Skripsi (Membership)
Mott, Joe L., author
Reston Publishing, 1983
Buku Teks
Universitas Indonesia, 2006
UI - Skripsi (Membership)
Tremblay, Jean-Paul, 1938-, author
McGraw-Hill, 1975
Buku Teks