Gaya APA

Setiyanta, Y, M., Suryono, Y. (1998). Graded Reading Series [Stage 4]: Belief in Friendship (Cet. 2. --). Yogyakarta: Kanisius.

Gaya MLA

Setiyanta, Y., Mei., Suryono, Yulius. "Graded Reading Series [Stage 4]: Belief in Friendship". Cet. 2. -- Yogyakarta: Kanisius, 1998. Text.