Cita APA (7a ed.)

PARRAGON BOOKS LTD. (2017). SELF- IMPROVEMENT PUZZLES BRAIN- BOOSTING CHALLENGES: PRACTICAL PUZZLES TO TRAIN YOUR BRAIN & IMPROVE YOUR MEMORY. PARRAGON BOOKS LTD.

Cita Chicago Style (17a ed.)

PARRAGON BOOKS LTD. SELF- IMPROVEMENT PUZZLES BRAIN- BOOSTING CHALLENGES: PRACTICAL PUZZLES TO TRAIN YOUR BRAIN & IMPROVE YOUR MEMORY. NEW YORK: PARRAGON BOOKS LTD, 2017.

Cita MLA (9a ed.)

PARRAGON BOOKS LTD. SELF- IMPROVEMENT PUZZLES BRAIN- BOOSTING CHALLENGES: PRACTICAL PUZZLES TO TRAIN YOUR BRAIN & IMPROVE YOUR MEMORY. PARRAGON BOOKS LTD, 2017.