Dyfyniad APA

O'Neil, P. V. (1993). Environmental chemistry (2nd ed.). Chapman and Hall.

Dyfyniad Arddull Chicago

O'Neil, Peter V. Environmental Chemistry. 2nd ed. London: Chapman and Hall, 1993.

Dyfyniad MLA

O'Neil, Peter V. Environmental Chemistry. 2nd ed. Chapman and Hall, 1993.

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