Παραπομπή APA

Spooner, G., & Mentzer, R. (1968). Introduction to number system. Prentice Hall.

Παραπομπή Chicago Style

Spooner, G.A, και R.L Mentzer. Introduction to Number System. New Jersey: Prentice Hall, 1968.

Παραπομπή MLA

Spooner, G.A, και R.L Mentzer. Introduction to Number System. Prentice Hall, 1968.