Griffith,Sandra. (2011). Manage quality customer service (1st Edition.). Excel Books.
Chicago-стиль цитированияGriffith,Sandra. Manage Quality Customer Service. 1st Edition. New Delhi: Excel Books, 2011.
MLA-цитированиеGriffith,Sandra. Manage Quality Customer Service. 1st Edition. Excel Books, 2011.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.