APA (7th ed.) Citation

Revell, J., Phillips, D., & Sheerin, S. (1991). Signature intermediate: Workbook. [s.n].

Chicago Style (17th ed.) Citation

Revell, Jane, Diane Phillips, and Susan Sheerin. Signature Intermediate: Workbook. NelSon, U.K: [s.n], 1991.

MLA (9th ed.) Citation

Revell, Jane, et al. Signature Intermediate: Workbook. [s.n], 1991.