Troppmann, R. (1969). Football's master defense guide. Parker Pub.
シカゴスタイル引用形Troppmann, Robert. Football's Master Defense Guide. West Nyack: Parker Pub, 1969.
MLA引用形式Troppmann, Robert. Football's Master Defense Guide. Parker Pub, 1969.
警告: この引用は必ずしも正確ではありません.