Cita APA (7th ed.)

Krause, A., & Olson, M. (1997). The basics of S and s-plus. Springer.

Cita Chicago (17th ed.)

Krause, Andreas, i Melvin Olson. The Basics of S and S-plus. Nueva York: Springer, 1997.

Cita MLA (9th ed.)

Krause, Andreas, i Melvin Olson. The Basics of S and S-plus. Springer, 1997.