Gaya APA
Systems and Programming Standars. (1977).
New York:
Petrocelli.
Gaya Chicago
Systems and Programming Standars.
.
New York:
Petrocelli,
1977.
.
Gaya MLA
Systems and Programming Standars.
.
New York:
Petrocelli,
1977.
.
Gaya Turabian
Systems and Programming Standars.
New York:
Petrocelli,
1977.
.