Hay, P., Phillips, D., & Sheerin, S. (1990). Signature -: Workbook. [s.n].
Chicago Style (17th ed.) CitationHay, Pat, Diane Phillips, and Susan Sheerin. Signature -: Workbook. NelSon, U.K: [s.n], 1990.
MLA (9th ed.) CitationHay, Pat, et al. Signature -: Workbook. [s.n], 1990.
Warning: These citations may not always be 100% accurate.