Gaya APA

SIANTURI, C, M. (2011). the relationship between perceived customer satisfaction and customer loyality in service firms . Medan: Universitas HKBP Nommensen.

Gaya MLA

SIANTURI, Charles, Makmur. "the relationship between perceived customer satisfaction and customer loyality in service firms". Medan: Universitas HKBP Nommensen, 2011. Artikel.