Cita APA

Umland, J. B., & Jean B. Umland. (1999). General chemistry. Pacific Grove: Thomson Brooks/Cole.

Chicago Style Citation

Umland, Jean B., i Jean B. Umland. General Chemistry. Pacific Grove: Thomson Brooks/Cole, 1999.

Cita MLA

Umland, Jean B., i Jean B. Umland. General Chemistry. Pacific Grove: Thomson Brooks/Cole, 1999.