Widodo Wahyu Purwanto
Depok: Pengkajian Energi UI, 2006
Buku Teks SO
Anderson, Alan J.B.
Chapman and Hall , 1989
Buku Teks SO
Gravetter, Frederick J.
Cengage Learning, 2013
Buku Teks SO
Gravetter, Frederick J.
Wadsworth and Cengage Learning, 2009
Buku Teks SO
Ronald E. Walpole, author; Raymond H. Myers, author; Sharon L. Myers, author; Keying Ye, author
Pearson, 2016
Buku Teks SO