APA Style

Irwanto, Agus, Barus, Simon P. (). . : .

Chicago Style

Irwanto, Agus, Barus, Simon P. . : , . .

MLA Style

Irwanto, Agus, Barus, Simon P. . : , . .

Turabian Style

Irwanto, Agus, Barus, Simon P. . : , . .