Gaya APA
MASON, R, D., LIND, D, A. (1990).
Statistical techniques in business and economics (6th ed.).
Homewood, IL:
Irwin.
Gaya MLA
MASON, Robert, D.., LIND, Douglas, A..
"Statistical techniques in business and economics".
6th ed.
Homewood, IL:
Irwin,
1990.
Buku.