APA (7 ম সংস্করণ) উদ্ধৃতি

Powell, D., Walker, E., & Elsworth, S. (2008). Grammar Practice for Upper Intermediate Students: With key (Third Edition.). Pearson Education Limited.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Powell, Debra, Elaine Walker, এবং Steve Elsworth. Grammar Practice for Upper Intermediate Students: With Key. Third Edition. Essex, England: Pearson Education Limited, 2008.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Powell, Debra, et al. Grammar Practice for Upper Intermediate Students: With Key. Third Edition. Pearson Education Limited, 2008.