MARDEN ORISON SWETT. (1961). CONQUEST OF WORRY. ORIENT PUBLISHING COMPANY.
Chicagoスタイル(17版)引用形式MARDEN ORISON SWETT. CONQUEST OF WORRY. DELHI: ORIENT PUBLISHING COMPANY, 1961.
MLA(9版)引用形式MARDEN ORISON SWETT. CONQUEST OF WORRY. ORIENT PUBLISHING COMPANY, 1961.
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