APA (7th ed.) Citation

Walker, E., & Elsworth, S. (1991). Blueprint: Workbook: intermediate. Longman Longman Group UK Limited.

Chicago Style (17th ed.) Citation

Walker, Elaine, and Steve Elsworth. Blueprint: Workbook: Intermediate. Essex, Inglaterra: Longman Longman Group UK Limited, 1991.

MLA (9th ed.) Citation

Walker, Elaine, and Steve Elsworth. Blueprint: Workbook: Intermediate. Longman Longman Group UK Limited, 1991.

Warning: These citations may not always be 100% accurate.