edited by David A. Caputo
W.H. Freeman, 1977
Buku Teks
Neve, Brian
Routledge, 1992
Buku Teks
Lieuwen, Edwin
Frederick A Praeger, 1960
Buku Teks
Snow, Peter G.
Holt, Rinehart and Winston, INC, 1967
Buku Teks
Campbell, John C., author
Harper & Row, 1967
Buku Teks