Irwin, 1988
Buku Teks
Robert F. Meigs ... [et al.]
Prentice Hall International, 2001
Buku Teks
Jayne Godfrey
John Wiley & Sons, 2006
Buku Teks
Jayne Godfrey
John Wiley & Sons, 2006
Buku Teks
Riahi-Belkaoui, Ahmed, 1943-, author
Harcourt Brace, 1993
Buku Teks