APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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