Yoder, Dale, author
McGraw-Hill, 1958
Buku Teks
Nankervis, Alan R., author
Thomas Nelson Australia, 1996
Buku Teks
Nankervis, Alan R., author
Thomas Nelson Australia, 1996
Buku Teks
Perry, John, author
McGraw-Hill, 1954
Buku Teks
Argyris, Chris, author
University Press, 1972
Buku Teks