(1971). Problemata. Frommann-Holzboog.
Chicago Style (17th ed.) CitationProblemata. Stuttgart- Bad Canstatt: Frommann-Holzboog, 1971.
MLA引文Problemata. Frommann-Holzboog, 1971.
警告:這些引文格式不一定是100%准確.
(1971). Problemata. Frommann-Holzboog.
Chicago Style (17th ed.) CitationProblemata. Stuttgart- Bad Canstatt: Frommann-Holzboog, 1971.
MLA引文Problemata. Frommann-Holzboog, 1971.