APA Style

Riyanto, Sugeng, Chawari, M. (). . : .

Chicago Style

Riyanto, Sugeng, Chawari, M. . : , . .

MLA Style

Riyanto, Sugeng, Chawari, M. . : , . .

Turabian Style

Riyanto, Sugeng, Chawari, M. . : , . .