APA Style
Heller, Robert. (2003).
Bill Gates .
Jakarta:
Erlangga.
Chicago Style
Heller, Robert.
Bill Gates.
Jakarta:
Erlangga,
2003.
.
MLA Style
Heller, Robert.
Bill Gates.
Jakarta:
Erlangga,
2003.
.
Turabian Style
Heller, Robert.
Bill Gates.
Jakarta:
Erlangga,
2003.
.