Grassian, V. (1984). Perennial philosophical issues. Prentice hall.
Chicagoスタイル(17版)引用形式Grassian, Victor. Perennial Philosophical Issues. New Jersey: Prentice hall, 1984.
MLA(9版)引用形式Grassian, Victor. Perennial Philosophical Issues. Prentice hall, 1984.
警告: この引用は必ずしも正確ではありません.