Powell, R. (1989). Why does God allow suffering? and other essays on the spiritual quest. AHP Paperbacks.
Chicagoスタイル(17版)引用形式Powell, Robert. Why Does God Allow Suffering? and Other Essays on the Spiritual Quest. Berkeley: AHP Paperbacks, 1989.
MLA(9版)引用形式Powell, Robert. Why Does God Allow Suffering? and Other Essays on the Spiritual Quest. AHP Paperbacks, 1989.
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