APA (7th ed.) Citation

Sippl, C. J., & Sippl, R. J. (1978). Programmable calculators: How to use them. Matrix Publ.

Chicago Style (17th ed.) Citation

Sippl, Charles J., and Roger J. Sippl. Programmable Calculators: How to Use Them. Portland, Or: Matrix Publ, 1978.

MLA (9th ed.) Citation

Sippl, Charles J., and Roger J. Sippl. Programmable Calculators: How to Use Them. Matrix Publ, 1978.