APA Style
Heller, Robert, Noerlambang, Herbhayu. ([s.a]).
Bill Gates / Robert Heller .
Jakarta:
Erlangga.
Chicago Style
Heller, Robert, Noerlambang, Herbhayu.
Bill Gates / Robert Heller.
Jakarta:
Erlangga,
[s.a].
Text.
MLA Style
Heller, Robert, Noerlambang, Herbhayu.
Bill Gates / Robert Heller.
Jakarta:
Erlangga,
[s.a].
Text.
Turabian Style
Heller, Robert, Noerlambang, Herbhayu.
Bill Gates / Robert Heller.
Jakarta:
Erlangga,
[s.a].
Print.