Peterson, P. W. (2005). Changing perspectives: A review of English tense system ( Intermediate/High intermediate). Washington, D.C: United States Department of State.
শিকাগো স্টাইলে সাইটেশনPeterson, Patricia Wilcox. Changing Perspectives: A Review of English Tense System ( Intermediate/High Intermediate). Washington, D.C: United States Department of State, 2005.
এমএলএ সাইটেশনPeterson, Patricia Wilcox. Changing Perspectives: A Review of English Tense System ( Intermediate/High Intermediate). Washington, D.C: United States Department of State, 2005.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.