Schuller ,Robert H. (1988). Tough Times Never Last But Tough People Do. Orient Paperbacks.
シカゴスタイル引用形Schuller ,Robert H. Tough Times Never Last But Tough People Do. Delhi: Orient Paperbacks, 1988.
MLA引用形式Schuller ,Robert H. Tough Times Never Last But Tough People Do. Orient Paperbacks, 1988.
警告: この引用は必ずしも正確ではありません.