Gaya APA
s.pd.,m.si, F, N. (1990).
Qualitative evaluation and research methods: second edition (Ed. 2).
newbury park:
Sage Publications.
Gaya MLA
s.pd.,m.si, Fatma, Nofriza,.
"Qualitative evaluation and research methods: second edition".
Ed. 2
newbury park:
Sage Publications,
1990.
Text.