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