APA Style

Isma'il, F, F., Mutawalli, A, H. (2012). Cara Mudah Belajar Filsafat . Yogyakarta: IRCiSoD.

MLA Style

Isma'il, Fu'ad, Farid., Mutawalli, Abdul, Hamid. "Cara Mudah Belajar Filsafat". Yogyakarta: IRCiSoD, 2012. Text.