SUMMERS GEORGE J. (1987). MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS.
Čikaški stil citiranja (17. izdanje)SUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. NEW DELHI: SUDHA PUBLICATIONS, 1987.
MLA način citiranja (9. izdanje)SUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS, 1987.
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