Referensi

Budnick, F. S. (1993). Applied Mathematics for Business, Economics, and The Social Sciences. McGraw-Hill, Inc.

Simangunsong, W., & Poyk, F. M. (2005). PKS Matematika Kelas XII. Jakarta: Gematama.

Stewart, J., Redlin, L., & Watson, S. (2012). Algebra and Trigonometry (3rd ed.). Belmont, CA, USA: Brooks/Cole, Cengage Learning.