Cita APA (7th ed.)

Flenner, H., Vogel, W., & O'Carroll, L. Joins and Intersections. Springer International Publishing.

Cita Chicago (17th ed.)

Flenner, Hubert, Wolfgang Vogel, i Liam O'Carroll. Joins and Intersections. Cham: Springer International Publishing.

Cita MLA (8th ed.)

Flenner, Hubert, et al. Joins and Intersections. Springer International Publishing.