Gaya APA

Harefa, A. (2002). Mutiara Pembelajar (Cet. 3. --). Yogyakarta: Gloria Cyver Ministries & Indonesia School of Life.

Gaya MLA

Harefa, Andraes. "Mutiara Pembelajar". Cet. 3. -- Yogyakarta: Gloria Cyver Ministries & Indonesia School of Life, 2002. Text / Book.