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Gaya APA

EQ, Z, M. (2009). Mengurai Variabel Hingga Instrumentasi . Yogyakarta: Yogyakarta:Graha Ilmu.

Gaya MLA

EQ, Zainal, Mustafa. "Mengurai Variabel Hingga Instrumentasi". Yogyakarta: Yogyakarta:Graha Ilmu, 2009. Text.