Gaya APA

Dewanti, C., Janah, N. (2014). Variasi Soal-soal Paling Sulit Sejarah . : Vicosta Publishing.

Gaya MLA

Dewanti, Cherly., Janah, Nur. "Variasi Soal-soal Paling Sulit Sejarah". : Vicosta Publishing, 2014. Text.