APA (7th ed.) Citation

DU VIVIER, M., HOPKINS, A., & POTTER, J. (1997). Work in progress: Teacher's resource book. Longman.

Chicago Style (17th ed.) Citation

DU VIVIER, MADELEINE, ANDY HOPKINS, and JOCELYN POTTER. Work in Progress: Teacher's Resource Book. Harlow: Longman, 1997.

MLA (8th ed.) Citation

DU VIVIER, MADELEINE, et al. Work in Progress: Teacher's Resource Book. Longman, 1997.