Gaya APA

Dul, J., Hak, T. (2012). Case study methodology in business research 1st (1st ed). New York, NY: Routledge.

Gaya MLA

Dul, Jan., Hak, Tony. "Case study methodology in business research 1st". 1st ed New York, NY: Routledge, 2012. Buku Wajib.