Dyfyniad APA

Fletcher, G. L., Smith, H. O., & Harrow, B. (1929). Beginning chemistry. American book Co.

Dyfyniad Arddull Chicago

Fletcher, Gustav L., Herbert O. Smith, and Benjamin Harrow. Beginning Chemistry. New York, Cincinnati [etc.]: American book Co, 1929.

Dyfyniad MLA

Fletcher, Gustav L., et al. Beginning Chemistry. American book Co, 1929.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.