Gaya APA

Neuman, W, L, (, L. (2000). Social research methods: qualitative and quantitative approaches (4th ed.). mau: Allyn and Bacon.

Gaya MLA

Neuman, W., Lawrence, (William, Lawrence),. "Social research methods: qualitative and quantitative approaches". 4th ed. mau: Allyn and Bacon, 2000. Text.