Gaya APA
WALPOLE, R, E. et al (2002).
PROBABILITY and statistics for engineers and scientist (7th ed.).
Upper Saddle River:
Prentice Hall.
Gaya MLA
WALPOLE, Ronald, E.. et al.
"PROBABILITY and statistics for engineers and scientist".
7th ed.
Upper Saddle River:
Prentice Hall,
2002.
Buku.