Cita APA (7a ed.)

Vervoort, G., & Mason, D. J. (1980). Beginning calculator math. D.S. Lake.

Cita Chicago Style (17a ed.)

Vervoort, Gerardus, y Dale J. Mason. Beginning Calculator Math. Belmont, Calif: D.S. Lake, 1980.

Cita MLA (9a ed.)

Vervoort, Gerardus, y Dale J. Mason. Beginning Calculator Math. D.S. Lake, 1980.