Gillett, Billy E.
Tata McGraw-Hill , 1994
Buku Teks
Juanda Napitupulu ... [et.al.]
Bagian penerbitan Institut Nasional Malang, 1998
Buku Teks
Wicks, C.T.
Pan Books, 1971
Buku Teks
Stoller, David S.
University of California Press, 1964
Buku Teks
Pangestu Subagyo
BPFE-UGM, 1989
Buku Teks