Gaya APA
PENNINGSTON, R, H. (1965).
INTRODUCTORY COMPUTER METHODS AND NUMERICAL ANALYSIS .
New York:
The Machmillan Company.
Gaya MLA
PENNINGSTON, Ralph, H..
"INTRODUCTORY COMPUTER METHODS AND NUMERICAL ANALYSIS".
New York:
The Machmillan Company,
1965.
Textbook.