Gaya APA

Wahyuni, S., Halim, D, A. (2012). Qualitative research method : theory and practice . Salemba Empat: Salemba Empat.

Gaya MLA

Wahyuni, Sari., Halim, Dedy, A.. "Qualitative research method : theory and practice". Salemba Empat: Salemba Empat, 2012. Text.