Referensi

Purcell, Edwin J.; Varberg, Dale;. (1987). Kalkulus dan Geometri Analitis (5 ed.). (I. N. Susila, B. Kartasasmita, & Rawuh, Penerj.) Erlangga.

Rosen, K. H., & Krithivasan, K. (2013). Discrete Mathematics and Its Applications (Global ed.). New York: McGraw-Hill.

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