APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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