SUMMERS GEORGE J. (1987). MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS.
Chicago (17e ed.) BronvermeldingSUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. NEW DELHI: SUDHA PUBLICATIONS, 1987.
MLA (9e ed.) BronvermeldingSUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS, 1987.
Let op: Deze citaties zijn niet altijd 100% accuraat.