Buckley, E. A. (1961). How to increase sales with letters. McGraw Hill.
シカゴスタイル引用形Buckley, Earle A. How to Increase Sales with Letters. McGraw Hill, 1961.
MLA引用形式Buckley, Earle A. How to Increase Sales with Letters. McGraw Hill, 1961.
警告: この引用は必ずしも正確ではありません.