Gaya APA

EFFENDY, Y. (2008). Thank You Problem 1; Masalah Membawa Hikmah (Cet. 1). Jakarta: Buana Media.

Gaya MLA

EFFENDY, Yudy.. "Thank You Problem 1; Masalah Membawa Hikmah". Cet. 1 Jakarta: Buana Media, 2008. Text.