APA (7th ed.) Citation

English A. K. Andrew K. & English L. M. Laura Monahon. (1998). North Star. High Intermediate: Focus Reading and Writing. Longman, 1998.

Chicago Style (17th ed.) Citation

English A. K. Andrew K. and English L. M. Laura Monahon. North Star. High Intermediate: Focus Reading and Writing. Longman, 1998, 1998.

MLA (9th ed.) Citation

English A. K. Andrew K. and English L. M. Laura Monahon. North Star. High Intermediate: Focus Reading and Writing. Longman, 1998, 1998.