Wainwright, G. (1999). Tricky business letters. Universities Press.
Chicagoスタイル(17版)引用形式Wainwright, Gordon. Tricky Business Letters. Hyderabad: Universities Press, 1999.
MLA(9版)引用形式Wainwright, Gordon. Tricky Business Letters. Universities Press, 1999.
警告: この引用は必ずしも正確ではありません.