Penrose. A Dream and a Chisel. University of South Carolina Press.
Chicagoスタイル(17版)引用形式Penrose. A Dream and a Chisel. University of South Carolina Press.
MLA(8版)引用形式Penrose. A Dream and a Chisel. University of South Carolina Press.
警告: この引用は必ずしも正確ではありません.