Gaya APA
PATTIS, R.
(1995).
Karel The Robot a Gentle Introduction to the Art of Programming
(
2)
.
U S A:
John Wiley.
Gaya MLA
PATTIS, Richard.
"Karel The Robot a Gentle Introduction to the Art of Programming".
2
U S A:
John Wiley,
1995.
Printed.