Gaya APA
ROPER, J.
(1975).
PL/1 in easy stages
.
CALIFORNIA:
DICKEON PLISG MPNY, INC.
Gaya MLA
ROPER, J.S..
"PL/1 in easy stages".
CALIFORNIA:
DICKEON PLISG MPNY, INC,
1975.
Text.