Παραπομπή APA

Sungsoo Pyo. (2012). Benchmarks in hospitality and tourism. THHP.

Παραπομπή Chicago Style

Sungsoo Pyo. Benchmarks in Hospitality and Tourism. London: THHP, 2012.

Παραπομπή MLA

Sungsoo Pyo. Benchmarks in Hospitality and Tourism. THHP, 2012.