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Gaya APA

Sumarsono, S. (2003). Manajemen Koperasi Teori dan Praktek . Yogyakarta: Graha Ilmu.

Gaya MLA

Sumarsono, Sonny. "Manajemen Koperasi Teori dan Praktek". Yogyakarta: Graha Ilmu, 2003. Text.