APA Style
Robert & Philip Ng. (2015).
Jakarta:
Obor Sarana Utama.
Chicago Style
Robert & Philip Ng.
.
Jakarta:
Obor Sarana Utama,
2015.
.
MLA Style
Robert & Philip Ng.
.
Jakarta:
Obor Sarana Utama,
2015.
.
Turabian Style
Robert & Philip Ng.
Jakarta:
Obor Sarana Utama,
2015.
.