APA Style

Purba, Juniar, Murlianti, Sri. (). . : .

Chicago Style

Purba, Juniar, Murlianti, Sri. . : , . .

MLA Style

Purba, Juniar, Murlianti, Sri. . : , . .

Turabian Style

Purba, Juniar, Murlianti, Sri. . : , . .