edited by C. Ronald Carroll, John H. Vandermeer and Peter Rosset
McGraw-Hill, 1990
Buku Teks
Cirad, 1999
Buku Teks
Azman Awang ... [et al.]
Institute Sultan Iskandar, 2001
Buku Teks
Pink, Sarah, author
Sage Publications , 2002
Buku Teks
edited by W. W. Cooper, H. J. Leavitt [and] M. W. Shelly II
John Wiley & Sons, 1964
Buku Teks