Gaya APA

Merriam, S, B., Tisdell, E, J. (2016). Qualitative Research : a guide to design and implementation (4th.Ed). USA: John Wiley & Sons.

Gaya MLA

Merriam, Sharan, B.., Tisdell, Elizabeth, J.. "Qualitative Research : a guide to design and implementation". 4th.Ed USA: John Wiley & Sons, 2016. Text.