SUMMERS GEORGE J. (1987). MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS.
芝加哥风格引文SUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. NEW DELHI: SUDHA PUBLICATIONS, 1987.
MLA引文SUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS, 1987.
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