Davis, P. (1988). Beyond the zone system (2nd ed.). Focal Press.
Chicagoスタイル(17版)引用形式Davis, Phil. Beyond the Zone System. 2nd ed. Boston: Focal Press, 1988.
MLA(9版)引用形式Davis, Phil. Beyond the Zone System. 2nd ed. Focal Press, 1988.
警告: この引用は必ずしも正確ではありません.