Gaya APA

Abdullah, A, A, M, I, S. (1999). Case study research in educational settings (Cet. 1). Guilford: Open University Press.

Gaya MLA

Abdullah, Abu, Alqaqa, Muhammad, Ibn, Shalih. "Case study research in educational settings". Cet. 1 Guilford: Open University Press, 1999. Text.